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Journal articles on the topic 'Alkaloids'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Han, Sunkyu, Sangbin Jeon, and Joonoh Park. "Syntheses of Dimeric Securinega Alkaloids." Synlett 28, no. 18 (2017): 2353–59. http://dx.doi.org/10.1055/s-0036-1590864.

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The isolation of flueggenines A and B by Yue and co-workers in 2006 has triggered a burst of isolation reports of dimeric and oligomeric securinega alkaloid natural products. The compelling molecular structures of these compounds with various modes of connection between monomeric securinega units have posed intriguing challenges to the synthetic organic community. Herein, we have categorized high-order securinega alkaloids based on their biosynthetic mode of dimerization or oligomerization. We then have compiled all reported syntheses of dimeric securinega alkaloids based on our classification

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2

Věžník, František, Eva Táborská, Hana Bochořáková, František Tureček, Vladimír Hanuš, and Jiří Slavík. "Alkaloids of Papaver nudicaule SUBSP. xanthopetalum (TRAUTV.) FEDDE and P. nudicaule SUBSP. album (REGEL) FEDDE from the section Scapiflora REICHB." Collection of Czechoslovak Chemical Communications 52, no. 6 (1987): 1634–40. http://dx.doi.org/10.1135/cccc19871634.

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The alkaloidal composition in the two title taxa differs only quantitatively. Both contain amurine as the main alkaloid. P. nudicaule ssp. xanthopetalum contains muramine, protopine and alkaloid PN1 (probably identical with (±)-nudaurine (Ia)) as dominant alkaloids; further were isolated amurensine, epialpinine, cryptopine, mecambridine and alpinigenine. Allocryptopine, papaverrubines A, B, D and G, palmatine and coptisine were detected chromatographically. The quaternary alkaloid fraction afforded cis-N-methylstylopinium hydroxide (as the iodide II) which was isolated for the first time from

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3

El-Shazly, Assem. "Pyrrolizidine Alkaloid Profiles of Some Senecio Species from Egypt." Zeitschrift für Naturforschung C 57, no. 5-6 (2002): 429–33. http://dx.doi.org/10.1515/znc-2002-5-604.

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Alkaloid profiles of two Egyptian Senecio species (Senecio aegyptius var. discoideus and S. desfontainei) in addition to a cultivated species (S. cineraria) were studied using capillary GLC and GLC-mass spectrometry with respect to pyrrolizidine alkaloids (PAs). Four alkaloids were identified in S. aegyptius var. discoideus, 8 in S. desfontainei and 13 in S. cineraria. Some of these alkaloids have not been reported from these plants. The alkaloidal pattern of different plant organs (flowers, leaves, stem, root) were also investigated. Senecionine has been found to be a one of the major alkaloi

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4

El-Shazly, A., A. M. Ateya, L. Witte, and M. Wink. "Quinolizidine Alkaloid Profiles of Retama raetam, R. sphaerocarpa and R. monosperma." Zeitschrift für Naturforschung C 51, no. 5-6 (1996): 301–8. http://dx.doi.org/10.1515/znc-1996-5-607.

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Abstract About 28 quinolizidine alkaloids and the dipiperidine alkaloids am modendrine, dehydroammodendrine and N -formylammodendrine were identified in the alkaloidal extracts of Retama raetam, Retama sphaerocarpa and Retama monosperma by capillary GLC and GLCMS. Alkaloid profiles of the three Retama species with a Mediterranean distribution are more similar than alkaloid patterns of different organs of the same plant. Whereas sparteine and retamine are the major components of stems, lupanine, retam ine, N-methylcytisine and cytisine dominate in flowers and pods, and cytisine in seeds indicat

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5

Slavík, Jiří, and Leonora Slavíková. "Alkaloids of Meconopsis cambrica (L.) VIG. and M. robusta HOOK. f. et THOMS." Collection of Czechoslovak Chemical Communications 61, no. 12 (1996): 1815–22. http://dx.doi.org/10.1135/cccc19961815.

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Additional alkaloids (+)-roemerine (3b), (+)-corytuberine (3d), (-)-N-methylmecambridinium and alkaloid MC 2 (the last two as iodides) were isolated as minor alkaloidal components from Meconopsis cambrica (L.) VIG. (Papaveraceae) besides of the dominant known alkaloids (-)-mecambrine (1), (-)-mecambridine (2), (-)-flavinantine (4) and (+)-magnoflorine (5), and a small amount of (+)-mecambroline (3a). Minute quantities of protopine, allocryptopine, roemeroline, papaverrubine D and C, berberine, coptisine, corysamine and palmatine were identified by thin layer chromatography (TLC). From M. robus

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6

Zhou, Shuaizhen, Ruolin Geng, Changqiang Ke, et al. "Expanding the Chemical Diversity of Stemona parviflora: Isolation and Characterization of New Parvistemoline-Type Alkaloids." Chemistry 7, no. 1 (2025): 6. https://doi.org/10.3390/chemistry7010006.

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A comprehensive phytochemical investigation of the whole plant of Stemona parviflora led to the isolation of 13 alkaloidal constituents, including five new alkaloids, parvistemonines B–F (1–5). The structures of these compounds were elucidated through extensive analyses of 1D and 2D NMR spectra, DFT NMR calculation, and comparisons with data in the literature. Notably, compounds 1–4 represent new examples of the rare parvistemoline-type alkaloids, with compound 4 showcasing a unique rearranged skeleton. Additionally, parvistemonine F (5) was identified as a distinct alkaloid skeleton character

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7

Sreevidya, Narasimhan, and Shanta Mehrotra. "Spectrophotometric Method for Estimation of Alkaloids Precipitable with Dragendorff's Reagent in Plant Materials." Journal of AOAC INTERNATIONAL 86, no. 6 (2003): 1124–27. http://dx.doi.org/10.1093/jaoac/86.6.1124.

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Abstract A rapid, easy, and simple spectrophotometric method was developed for the estimation of total alkaloids precipitated by Dragendorff's reagent (DR) in plant materials. It is based on the formation of yellow bismuth complex in nitric acid medium with thiourea. The yellow-colored complex formed obeys Lambert-Beer's law in the concentration range of 0.06–50 μg/mL with λmax at 435 nm. Using this method, the alkaloidal percentage of certain alkaloids (ajamalicine, papaverine, cinchonine, piperine, berberine) and some plant materials containing alkaloids (Berberis aristata, Solanum nigrum, a

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8

Lim, Hyeonggeun, Sikwang Seong, and Sunkyu Han. "Syntheses of Post-Iboga Alkaloids." Synthesis 51, no. 14 (2019): 2737–58. http://dx.doi.org/10.1055/s-0037-1612061.

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Post-iboga alkaloids are secondary metabolites that are biosynthetically derived from iboga-type alkaloids via rearrangements of the indole and/or isoquinuclidine moieties. Herein, we categorize post-iboga alkaloids into five types based on the biosynthetic mode of transformation of the iboga scaffold. We then describe reported syntheses of post-iboga alkaloids, including our laboratory’s recent contributions, based on our own categorization.1 Introduction1.1 Iboga and Post-Iboga Alkaloids1.2 Classification of Post-Iboga Alkaloids1.2.1 Introduction to Type I Post-Iboga Alkaloids1.2.2 Introduct

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9

Dewan, S. Bhakuni. "Biosynthesis and synthesis of biologically active alkaloids of Indian medicinal plants." Journal of Indian Chemical Society Vol. 79, Mar 2002 (2002): 203–10. https://doi.org/10.5281/zenodo.5840849.

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Central Drug Research Institute, Lucknow-226 001, India <em>E-mail :</em>Root@cdrilk.Sirnetd.ernet.in               <em>Fax : </em>91-0522-223405/223938 The structure and stereochemistry of biologically active alkaloids isolated from <em>Croton sparsiflorus, Cocculus laurifolius, C. pendulus, Corydalis meifolia </em>and <em>Stephania glabra </em>were established. Biosynthetic studies were carried out on proaporphine and dihydroproaporphgne alkaloids, crotsparine and crotsparinine, and abnormal aporphine alkaloid sparsiflorine; abnormal <em>Eryt

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10

Doncheva, Tsvetelina, Gabriela Yordanova, Vassil Vutov, Nadezhda Kostova, and Stefan Philipov. "Comparative Study of Alkaloid Pattern of Four Bulgarian Fumaria Species." Natural Product Communications 11, no. 2 (2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100220.

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The alkaloid pattern of four Fumaria species ( Fumaria kralikii, Fumaria rostellata, Fumaria schleicherii, Fumaria thuretii) growing in Bulgaria was investigated by GC-MS and twenty isoquinoline alkaloids were determined. Phytochemical investigation of the alkaloid composition on Fumaria thuretii Boiss was made for the first time. The alkaloid profile of the species was compared at two levels, between different species and within two species from different habitats. Two chemotypical groups, based on the types of isoquinoline alkaloids were suggested. To group A belong species F. kralikii, F. r

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11

El-Shazly, Assem, Abdel-Monem M. Ateya, and Michael Wink. "Quinolizidine Alkaloid Profiles of Lupinus varius orientalis, L. albus albus, L. hartwegii, and L. densiflorus." Zeitschrift für Naturforschung C 56, no. 1-2 (2001): 21–30. http://dx.doi.org/10.1515/znc-2001-1-204.

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Abstract Alkaloid profiles of two Lupinus species growing naturally in Egypt (L. albus albus [synonym L. term is], L. varius orientalis) in addition to two New World species (L. hartwegii, L. densiflorus) which were cultivated in Egypt were studied by capillary GLC and GLC-mass spectrometry with respect to quinolizidine alkaloids. Altogether 44 quinolizidine, bipiperidyl and proto-indole alkaloids were identified; 29 in L. albus, 13 in L. varius orientalis, 15 in L. hartwegii, 6 in L. densiflorus. Some of these alkaloids were identified for the first time in these plants. The alkaloidal patter

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12

Marsi Mbayo Kitambala, Emery Kalonda Mutombo, Blandine Nkiko Niyibizi, et al. "The in vitro antisickling effect of purified alkaloids of Cremaspora triflora (Thonn.) K. Schum. (Rubiaceae) and Macaranga schweinfurthii Pax. (Euphorbiaceae)." World Journal of Advanced Research and Reviews 9, no. 3 (2021): 129–37. http://dx.doi.org/10.30574/wjarr.2021.9.3.0074.

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Introduction and objective: Sickle cell disease is an inherited pathology to an abnormality of hemoglobin precisely hemoglobin S for which there is no curative therapy. It mainly affects sub-Saharan African and Caribbean populations. Thus, this study aims to make the phytochemical screening of Cremaspora triflora and Macaranga schweinfurthii as well as to evaluate the antisickling activity of their purified alkaloids. Methodology: Chemical screening was performed using color and precipitation tests as well as the foam index method. The extraction of the alkaloids was carried out with organic s

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13

Wink, M., and L. Witte. "Quinolizidine Alkaloids as Nitrogen Source for Lupin Seedlings and Cell Cultures." Zeitschrift für Naturforschung C 40, no. 11-12 (1985): 767–75. http://dx.doi.org/10.1515/znc-1985-11-1204.

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Abstract The alkaloid patterns during germination and seedling development of Lupinus polyphyllus, L. angustifolius, L. albus, L. pubescens, Cytisus scoparius, Baptisia australis, Spartium junceum and Laburnum anagyroides were studied by capillary glc and EI-MS and CI-MS. The alkaloid contents were relatively high in the seeds and decreased by 20-100% during germination and the early developmental stages. The plants with fully developed leaves were able to synthesize new alkaloids. The decrease of alkaloid concentrations during germination was interpreted in terms of alkaloid turnover and use

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14

O, Archana, and Praveen Kumar Nagadesi. "Endophytic, Non-endophytic Fungal Alkaloids and its Applications." Saudi Journal of Pathology and Microbiology 7, no. 1 (2022): 4–19. http://dx.doi.org/10.36348/sjpm.2022.v07i01.002.

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Alkaloids are a secondary metabolite, which are extracted from a wide – array of organisms include Bacteria, Fungi, Plants and Animals. Here in present review mainly focused on the alkaloids derived from endophytic fungi and non – endophytic fungi. Fungi have provided a great source of spirit for novel drug compounds as fungi derived alkaloids have done major boon to human health and well - being. In the present review listed 35 different group of alkaloids from endophytes. In which 12 different alkaloids are kept under derivatives of Indole group, 4 different alkaloids are kept under Quinolin

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15

Namdar, Dvory, Patrick P. J. Mulder, Eyal Ben-Simchon, et al. "New Analytical Approach to Quinolizidine Alkaloids and Their Assumed Biosynthesis Pathways in Lupin Seeds." Toxins 16, no. 3 (2024): 163. http://dx.doi.org/10.3390/toxins16030163.

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Alkaloids play an essential role in protecting plants against herbivores. Humans can also benefit from the pharmacological effects of these compounds. Plants produce an immense variety of structurally different alkaloids, including quinolizidine alkaloids, a group of bi-, tri-, and tetracyclic compounds produced by Lupinus species. Various lupin species produce different alkaloid profiles. To study the composition of quinolizidine alkaloids in lupin seeds, we collected 31 populations of two wild species native to Israel, L. pilosus and L. palaestinus, and analyzed their quinolizidine alkaloid

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16

Berkova, Strahil, and Rawia Zayed. "Comparison of Tropane Alkaloid Spectra Between Datura innoxia Grown in Egypt and Bulgaria." Zeitschrift für Naturforschung C 59, no. 3-4 (2004): 184–86. http://dx.doi.org/10.1515/znc-2004-3-409.

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The alkaloid spectra of Datura innoxia plants grown in Egypt and Bulgaria were investigated by GC-MS. Thirty-eight alkaloids were detected in the roots, leaves and fruits of the plants. Five new alkaloids for D. innoxia are reported. Alkaloid spectra of Egyptian and Bulgarian plants differ significantly in respect to their alkaloid composition and main alkaloids accumulated in the plant organs.

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17

Ayer, William A., Lois M. Browne, A. Warren Elgersma, and Peter P. Singer. "Identification of some L-numbered Lycopodium alkaloids." Canadian Journal of Chemistry 68, no. 8 (1990): 1300–1304. http://dx.doi.org/10.1139/v90-200.

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The pioneering research on Lycopodium alkaloids carried out by R. H. F. Manske and L. Marion led to the characterization of a large number of alkaloids. Many of these alkaloids were designated by numbers preceded by an L (e.g., L1, which has since been shown to be dihydrolycopodine). While the identity of many of these alkaloids has now been established, several remain unreported. We have examined samples of alkaloids L15, L16, L17, L18, L22, L24, L25, L26, L28, L29, L31, and L35, obtained from Marion's collection, by GC–MS and GC–IR, and report herein the identity of these alkaloids and alkal

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18

Dank, Christian, Randy Sanichar, Ken-Loon Choo, Madeline Olsen, and Mark Lautens. "Recent Advances Towards Syntheses of Diterpenoid Alkaloids." Synthesis 51, no. 21 (2019): 3915–46. http://dx.doi.org/10.1055/s-0037-1611897.

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The diterpenoid alkaloids serve as a rich source of synthetic targets for organic chemists, due to the intriguing structure of the overlapping ring systems, along with biological activities commonly associated with compounds of this group. Fifteen total syntheses and numerous synthetic studies towards construction of ring fragments have been reported since 2010. This review article gives a brief overview of diterpenoid alkaloids and summarizes the recent synthetic efforts.1 Introduction1.1 Structural Classification and Biosynthetic Origin1.2 Structure Elucidation of the Aconitum Alkaloids2 Tot

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Panaccione, Daniel, James Kotcon, Christopher Schardl, Richard Johnson, and Joseph Morton. "Ergot alkaloids are not essential for endophytic fungus-associated population suppression of the lesion nematode, Pratylenchus scribneri, on perennial ryegrass." Nematology 8, no. 4 (2006): 583–90. http://dx.doi.org/10.1163/156854106778614074.

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AbstractSeveral endophytic fungi of the genus Neotyphodium form symbiotic associations with Lolium spp. grasses and are renowned for production of bioactive alkaloids such as ergot alkaloids. Some of these endophytes make their grass partners less suitable as hosts for endoparasitic nematodes, including Pratylenchus spp. The potential for ergot alkaloids to affect nematode motility was investigated in vitro. Ergovaline, the ergot alkaloid pathway end product of several Neotyphodium spp., was the only ergot alkaloid tested that inhibited motility of Pratylenchus scribneri. The association of er

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20

Scott, Peter M., Gary A. Lombaert, Peter Pellaers, Stanley Bacler, and Judy Lappi. "Ergot Alkaloids in Grain Foods Sold in Canada." Journal of AOAC INTERNATIONAL 75, no. 5 (1992): 773–79. http://dx.doi.org/10.1093/jaoac/75.5.773.

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Abstract Six pharmacologically active ergot alkaloids (ergonovine [ergometrine], ergosine, ergotamine, ergocornine, α-ergokryptine, and ergocristine) were determined by liquid chromatography with fluorescence detection in over 400 samples of grain foods. The survey was conducted over a 6-year period for rye flour, wheat flour, and bran/bran cereal, and a 5-year period for rye bread/crispbread; triticale flour was analyzed over a total of 3 years. The predominant alkaloids found were ergocristine and ergotamine. Rye flour was the most contaminated food; the incidence of alkaloid-positive sample

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21

Aljeboory, Ali A. H., Rafid M. Hashim, Reem G. Hussein, and Yahya Y. Z. Farid. "Capparis Spinosa as an Alternative Nanoscience Medicine in Treatment of Cancer (A New Aspect of Cancer Treatment)." Journal Port Science Research 7, no. 1 (2024): 77–86. http://dx.doi.org/10.36371/port.2024.1.10.

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Because of its high number of bioactive constituents in Capparis Spinosa especially polyphenolic compounds. We have studied the extraction and identification of active constituents of bioorganic solvents polar and non-polar we have managed to identify new qualities and quantities of alkaloids from residue of chloroformic extract and separate three groups of alkaloid including tertiary - quaternary strong base alkaloid and classify the obtained individual alkaloids three groups weakly bases alkaloids, alkaloids of medium basicity, strongly bases alkaloid we found promising quantity of alkaloids

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22

Nikolic, Milan, and Sinisa Djordjevic. "Alkaloids in the pharmaceutical industry: Structure, isolation and application." Chemical Industry 57, no. 10 (2003): 471–78. http://dx.doi.org/10.2298/hemind0310471n.

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By the end of the 18th and the beginning of the 19th century a new era began in medicine, pharmaceutics and chemistry that was strongly connected with alkaloids and alkaloid drugs. Even before that it was known that certain drugs administered in limited doses were medicines, and toxic if taken in larger doses (opium, coke leaves, belladonna roots, monkshood tubers crocus or hemlock seeds). However, the identification, isolation and structural characterization of the active ingredients of the alkaloid drugs was only possible in the mid 20th century by the use of modern extraction equipment and

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23

Berkov, Strahil, Luba Evstatieva, and Simeon Popov. "Alkaloids in Bulgarian Pancratium maritimum L." Zeitschrift für Naturforschung C 59, no. 1-2 (2004): 65–69. http://dx.doi.org/10.1515/znc-2004-1-214.

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A GC/MS analysis of alkaloids from leaves, bulbs and roots of Pancratium maritimum was performed. From the identified 16 alkaloids, 5 alkaloids were reported for the first time for this plant. Several compounds with pharmacological activity were found. Haemanthamine was main alkaloid in the leaves and bulbs whereas galanthane was found to be main alkaloid in roots.

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Breiterová, Kateřina, Miroslav Ločárek, Eliška Kohelová, et al. "Daffodils as Potential Crops of Biologically-active Compounds: Assessment of 40 Ornamental Taxa for their Alkaloid Profile and Cholinesterases Inhibition Activity." Natural Product Communications 13, no. 4 (2018): 1934578X1801300. http://dx.doi.org/10.1177/1934578x1801300410.

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Many varieties of Narcissus (Amaryllidaceae) are planted on a large scale for ornamental purposes and at the same time they represent a rich reservoir of potential small chemical molecules that display several medicinal properties. Of the Amaryllidaceae alkaloids, considerable attention has been given to galanthamine, which possesses acetylcholinesterase inhibitory activity. Recent investigation has shown the pharmaceutical potential of other Amaryllidaceae alkaloids, such as lycorine, haemanthamine, and pancratistatine, primarily as anticancer drugs. In the current study, 40 Narcissus taxa we

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Sun, Bo, Yu-Xiao Tian, Fen Zhang, et al. "Variations of Alkaloid Accumulation and Gene Transcription in Nicotiana tabacum." Biomolecules 8, no. 4 (2018): 114. http://dx.doi.org/10.3390/biom8040114.

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To increase the understanding of alkaloid biosynthesis in Nicotiana tabacum during whole plant growth periods, variations of the contents of alkaloids and the transcription of key biosynthetic genes in fresh leaves were investigated in three varieties at five developmental stages. Six alkaloids were analyzed by gas chromatograph–mass spectrometry (GC–MS) and the most abundant alkaloid was observed during the upper leaves maturing stage in the varieties, among which the alkaloid content of K326 was the highest. Considering the genetic effect, variance analysis indicated that the developmental s

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Slavík, Jiří, Ladislav Dolejš, and Leonora Slavíková. "Alkaloids from Corydalis solida (L.) SW. mass spectrometry of quaternary benzylisoquinoline alkaloids." Collection of Czechoslovak Chemical Communications 50, no. 10 (1985): 2299–309. http://dx.doi.org/10.1135/cccc19852299.

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From the strongly polar fraction from the tubers of Corydalis solida (L.) SW., a new quaternary alkaloid, (+)-N-methyllaudanidinium iodide, was isolated after conversion to iodides. Mass spectrometric behaviour of this type of quaternary alkaloids is described. In the tubers (0.37% of alkaloids) the main alkaloid component is (+)- and (±)-tetrahydropalmatine; other dominant alkaloids include protopine, (+)-corydaline, allocryptopine, dehydrocorydaline and jatrorrhizine. (±)-Corybulbine, (+)-corypalmine, (-)-isocorypalmine, (-)-scoulerine, (-)-stylopine, corysamine, palmatine, (+)-N-methyllauda

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Setyaningrum, Lindawati, and Dhina Ayu Susanti. "PENETAPAN KADAR ALKALOID TOTAL PADA EKSTRAK N-HEKSAN DAN ETANOL BIJI KETUMBAR (Coriandrum sativum) MENGGUNAKAN SPEKTROFOTOMETER UV-Vis." Jurnal Riset Kefarmasian Indonesia 4, no. 3 (2022): 353–65. http://dx.doi.org/10.33759/jrki.v4i3.268.

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Coriander (Coriandrum sativum) is one of the medicinal plants which is known to contain secondary metabolites such as flavonoids, tannins, terpenoids, saponins, steroids, and alkaloids. Alkaloids have therapeutic effects as antimalarials and cancer. Research in determining the alkaloids in coriander was carried out by separating the alkaloids from other substances using the soxhlet method extraction with two solvents ethanol and n-hexane. The total alkaloid content is determined using a UV-VIS spectrophotometer at wavelength 351,5 nm. The reaction of alkaloids with Bromocresol green (BCG) is o

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Vieira, Ivo J. C., Walter L. B. Medeiros, Cecilia S. Monnerat, et al. "Two fast screening methods (GC-MS and TLC-ChEI assay) for rapid evaluation of potential anticholinesterasic indole alkaloids in complex mixtures." Anais da Academia Brasileira de Ciências 80, no. 3 (2008): 419–26. http://dx.doi.org/10.1590/s0001-37652008000300003.

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The pharmacotherapyfor Alzheimer's disease (AD) includes the use of acetylcholinesterase inhibitors (AChEI). Recent investigations for novel AD therapeutic agents from plants suggested that Tabernaemontana genus is a promising source of novel anticholinesterasic indole alkaloids. In this work two fast screening techniques were combined in order to easily identify novel cholinesterase inhibitors (ChEI). Gas chromatography-mass spectrometry (GC-MS) of the less polar alkaloidic fractions obtained from the acid-base extraction of the stalk of T. laeta revealed thirteen monoindole alkaloids, four o

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Bhambhani, Sweta, Kirtikumar R. Kondhare, and Ashok P. Giri. "Diversity in Chemical Structures and Biological Properties of Plant Alkaloids." Molecules 26, no. 11 (2021): 3374. http://dx.doi.org/10.3390/molecules26113374.

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Phytochemicals belonging to the group of alkaloids are signature specialized metabolites endowed with countless biological activities. Plants are armored with these naturally produced nitrogenous compounds to combat numerous challenging environmental stress conditions. Traditional and modern healthcare systems have harnessed the potential of these organic compounds for the treatment of many ailments. Various chemical entities (functional groups) attached to the central moiety are responsible for their diverse range of biological properties. The development of the characterization of these plan

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Slavík, Jiří, and Leonora Slavíková. "Alkaloids from Corydalis nobilis (L.) PERS. and C. intermedia (L.) MÉRAT." Collection of Czechoslovak Chemical Communications 54, no. 7 (1989): 2009–20. http://dx.doi.org/10.1135/cccc19892009.

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Rhizomes of Corydalis nobilis (L.) PERS. (3% of alkaloids) contain (+)-tetrahydropalmatine, (+)-bicuculline and (+)-corytuberine as the main constituents of the tertiary alkaloid fraction. Protopine, (+)-corypalmine and (+)-stylopine, which also belong to the dominant alkaloids, were isolated in lesser amounts. As minor alkaloids were isolated (±)-tetrahydropalmatine, (+)-corydaline, allocryptopine, cryptopine, (-)-scoulerine, (+)-adlumidine, (+)-sinactine, (±)-corlumine, isoboldine, (+)-corybulbine, (±)-stylopine and (-)-isocorypalmine. The fraction of quaternary protoberberine alkaloids affo

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Marsi, Mbayo Kitambala, Kalonda Mutombo Emery, Nkiko Niyibizi Blandine, et al. "The in vitro antisickling effect of purified alkaloids of Cremaspora triflora (Thonn.) K. Schum. (Rubiaceae) and Macaranga schweinfurthii Pax. (Euphorbiaceae)." World Journal of Advanced Research and Reviews 09, no. 03 (2021): 129–37. https://doi.org/10.5281/zenodo.4660068.

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Introduction and objective: Sickle cell disease is an inherited pathology to an abnormality of hemoglobin precisely hemoglobin S for which there is no curative therapy. It mainly affects sub-Saharan African and Caribbean populations. Thus, this study aims to make the phytochemical screening of <em>Cremaspora triflora</em> and <em>Macaranga schweinfurthii</em> as well as to evaluate the antisickling activity of their purified alkaloids. Methodology: Chemical screening was performed using color and precipitation tests as well as the foam index method. The extraction of the al

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Táborská, Eva, Milena Mikešová, František Věžník, and Jiří Slavík. "Alkaloids of the two Hypecoum L. species." Collection of Czechoslovak Chemical Communications 52, no. 2 (1987): 508–13. http://dx.doi.org/10.1135/cccc19870508.

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Alkaloids from Hypecoum procumbens L. and H. leptocarpum HOOK. F. et THOMS. were investigated. Protopine was the dominant alkaloid in both species. From H. procumbens chelerythrine and corydine were newly isolated in addition to the earlier detected alkaloids allocryptopine, sanguinarine, coptisine, and isocorydine. From H. leptocarpum allocryptopine, isocorydine and corydine were isolated for the first time, in addition to the earlier described alkaloids protopine, sanguinarine, chelerythrine and coptisine. Cryptopine was detected chromatographically. From the fraction of strongly polar alkal

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Jones, Nadiá M., M. Gabriela Bernardo-Gil, and M. Graço Lourenco. "Comparison of Methods for Extraction of Tobacco Alkaloids." Journal of AOAC INTERNATIONAL 84, no. 2 (2001): 309–16. http://dx.doi.org/10.1093/jaoac/84.2.309.

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Abstract Ultrasound and microwave techniques were used to extract tobacco alkaloids, and response surface methodology was used to optimize extraction conditions. Ultrasonic technique factors were temperature, 30–85°C; time, 3–45 min; solvent volume, 8–80 mL. Microwave extraction factors were pressure, 15–75 psi; time, 3–40 min; power, 30–90% of the maximum magnetron power of 650 W. Soxhlet and solvent AOAC-modified extraction methods were also applied after some improvements. Nicotine, nornicotine, anabasine, and anatabine were quantified by gas chromatography. A steam distillation Internation

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Germán-Soto, Brianda Giselle, José Basilio Heredia, Nayely Leyva-López, et al. "Bioaccessibility and Antioxidant Capacity of Alkaloids from Microencapsulated Extract of Eggplant (Solanum melongena L.) Biomass." Horticulturae 10, no. 12 (2024): 1242. http://dx.doi.org/10.3390/horticulturae10121242.

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Eggplant is a vegetable grown worldwide, and due to quality standards, large amounts of biomass are generated after harvest. Biomass is considered a source of bioactive compounds with antioxidant properties. Therefore, this research aimed to evaluate the bioaccessibility (BA) and antioxidant capacity of microencapsulated alkaloids from eggplant fruit biomass. Eggplant biomass was collected, and the total alkaloid content, antioxidant capacity (TEAC, FRAP, and ORAC), and alkaloid profile (UPLC/MS) were determined before and after the in vitro digestion of encapsulated and non-encapsulated alkal

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Cahlíková, Lucie, Radim Kučera, Anna Hošt’álková, Jiří Klimeš, and Lubomír Opletal. "Identification of Pavinane Alkaloids in the Genera Argemone and Eschscholzia by GC-MS." Natural Product Communications 7, no. 10 (2012): 1934578X1200701. http://dx.doi.org/10.1177/1934578x1200701008.

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The genera Eschscholtzia and Argemone(Papaveraceae) represent a rich source of pavinane alkaloids, the identification of which in alkaloid extracts is generally problematic without standards. The alkaloid extracts of three Argemone and four Eschscholtzia species were analyzed using GC-MS. The alkaloids were identified based on comparison of their mass spectra with commercial libraries, with reported data in the literature and with spectra of reference compounds. A total of 23 alkaloids of six structural types (pavinane, protopine, benzylisoquinoline, benzophenanthridine, aporphine and protober

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Shukla, S., H. K. Yadav, A. Rastogi, B. K. Mishra, and S. P. Singh. "Alkaloid diversity in relation to breeding for specifi c alkaloids in opium poppy (Papaver somniferum L.)." Czech Journal of Genetics and Plant Breeding 46, No. 4 (2010): 164–69. http://dx.doi.org/10.17221/96/2009-cjgpb.

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Papaver somniferum is a chief source of diverse physiologically active alkaloids, required by the pharmaceutical industry. The present study describes the diversity of the alkaloid spectrum of 122 opium poppy accessions of Indian origin by means of a cluster analysis based on Mahalanobis generalised distances. The accessions could be grouped into 11 clusters according to their relationship between the contents of morphine, codeine, thebaine, narcotine and papaverine in raw opium. The diversity of the alkaloid spectrum of 11 clusters reflected the very low correlations between the contents of t

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Llalla-Cordova, Olimpia, Javier E. Ortiz, Luciana R. Tallini, et al. "Alkaloid Profile, Anticholinesterase and Antioxidant Activities, and Sexual Propagation in Hieronymiella peruviana (Amaryllidaceae)." Plants 14, no. 2 (2025): 281. https://doi.org/10.3390/plants14020281.

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Hieronymiella peruviana, a recently described endemic species from southern Peru, belongs to the Amaryllidaceae family and is known for its diversity of alkaloids. Amaryllidoideae have been studied for their diverse biological activities, particularly for their properties in treating neurodegenerative diseases. This work examines the alkaloidal profile using GC-MS and UPLC-MS/MS of alkaloid-enriched extracts obtained from the leaves and bulbs of H. peruviana and their inhibitory activity against acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE) enzymes. In addition, the phenolic an

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Chacón-Fuentes, Manuel, César Burgos-Díaz, Mauricio Opazo-Navarrete, Alan Mercado, and Fernando Westermeyer. "Berberine and Palmatine Distribution Across Plant Organs in Berberis darwinii: Basis for Selecting Superior-Producing Accessions." Molecules 30, no. 8 (2025): 1849. https://doi.org/10.3390/molecules30081849.

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Berberis darwinii, known for its bioactive alkaloids like berberine and palmatine, has gained attention for its medicinal properties. However, comprehensive studies on the specific bioactive molecules of Michay are lacking, as previous research has primarily focused on wild plants. Therefore, this study proposes to evaluate the alkaloid content in various tissues of B. darwinii collected from different locations, aiming to identify high-yielding accessions suitable for consistent bioactive alkaloid production. This research focuses on plants from a cultivated Michay orchard established five ye

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Turner, Matthew, Roberto Cruz, Jordan Elwell, John French, Jared Mattos, and Owen McDougal. "Native V. californicum Alkaloid Combinations Induce Differential Inhibition of Sonic Hedgehog Signaling." Molecules 23, no. 9 (2018): 2222. http://dx.doi.org/10.3390/molecules23092222.

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Veratrum californicum is a rich source of steroidal alkaloids such as cyclopamine, a known inhibitor of the Hedgehog (Hh) signaling pathway. Here we provide a detailed analysis of the alkaloid composition of V. californicum by plant part through quantitative analysis of cyclopamine, veratramine, muldamine and isorubijervine in the leaf, stem and root/rhizome of the plant. To determine whether additional alkaloids in the extracts contribute to Hh signaling inhibition, the concentrations of these four alkaloids present in extracts were replicated using commercially available standards, followed

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Martin, Bruna Cavinatti, Ivan De-la-Cruz-Chacón, Carolina Ovile Mimi, et al. "Impact of External Sources of Indole Acetic Acid and 2,3,5-Triiodobenzoic Acid on Alkaloid Production and Their Relationships with Primary Metabolism and Antioxidant Activity in Annona emarginata (Schltdl.) H. Rainer." Plants 13, no. 18 (2024): 2637. http://dx.doi.org/10.3390/plants13182637.

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Annona emarginata is a native Brazilian species capable of producing at least ten alkaloids of ecological, agronomic, and pharmacological importance. Some studies have explored the effect of external phytoregulators on the production of alkaloids, including the effect of auxins, which, like alkaloids, derive from the shikimic acid pathway. Thus, this study aimed to evaluate how indole acetic acid (IAA) and its inhibitor 2,3,5-triiodobenzoic acid (TIBA) impact the production of alkaloids and the primary metabolism of A. emarginata, which brings advances in the understanding of the mechanisms of

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Pawelka, Karl-Heinz, and Joachim Stöckigt. "Indole Alkaloids from Ochrosia elliptica Plant Cell Suspension Cultures." Zeitschrift für Naturforschung C 41, no. 4 (1986): 381–84. http://dx.doi.org/10.1515/znc-1986-0402.

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From cell suspension cultures of Ochrosia elliptica Labill. eight different monoterpenoid indole alkaloids were isolated and comprised three alkaloid classes viz. Corynanthe/Heteroyohimbine (tetrahydroalstonine, cathenamine, pleiocarpamine and two methoxylated heteroyohimbines), Strychnos (norfluorocurarine), Apparicine (apparicine and epchrosine). A ll these compounds except the Strychnos alkaloid are biogenetically closely related to the known alkaloids occurring in Ochrosia plants, although such alkaloids have not previously been detected in O. elliptica. Epchrosine has not before been desc

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Mimi, Carolina Ovile, Iván De-la-Cruz-Chacón, Felipe Moura Araujo da Silva, Victor Cauan Rocha Roberto, and Gisela Ferreira. "Effect of Auxins on the Accumulation of Alkaloids in Ungrafted Annona emarginata (Schltdl.) H. Rainer and Annona emarginata (Schltdl.) H. Rainer Grafted with Annona atemoya Mabb." Molecules 30, no. 9 (2025): 2070. https://doi.org/10.3390/molecules30092070.

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Plant regulators, such as auxins, modulate the synthesis of specialized metabolites and aid in the bioprospection of molecules. Annona emarginata is known to produce antifungal alkaloids and serves as a rootstock for Annona atemoya. This study evaluated the effects of indoleacetic acid (IAA), indolebutyric acid (IBA), and naphthaleneacetic acid (NAA) applications on the accumulation of alkaloids in ungrafted A. emarginata and grafted with A. atemoya. Total alkaloids were analyzed by spectrophotometry, and alkaloid profiles were analyzed by DI-MS at 8, 14, and 20 days after treatments (DAT). Th

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Tittlemier, S. A., D. Drul, M. Roscoe, and J. G. Menzies. "The effects of selected factors on measured ergot alkaloid content in Claviceps purpurea-infected hexaploid and durum wheat." World Mycotoxin Journal 9, no. 4 (2016): 555–64. http://dx.doi.org/10.3920/wmj2015.2019.

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Four wheat genotypes, including the ergot-susceptible durum ‘AC Avonlea’ and hard red spring wheat ‘AC Cadillac’, as well as the resistant durum wheat line 9260B-173A and the hard red spring wheat line ‘Kenya Farmer’ wereinoculated with different Claviceps purpurea isolates. Honeydew and sclerotia were collected and analysed for 10 ergot alkaloids. Total concentrations of the 10 ergot alkaloids ranged from 16 µg/kg in honeydew to 1,798 mg/kg insclerotia. Ergonovine and ergosine were the predominant alkaloids in honeydew obtained from plants inoculated with various isolates, whereas ergocristin

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Chaplin, JF. "Die Züchtung von TabakimHinblick auf verschieden hohe Alkaloidgehalte - Tobacco Breeding in View of Different Levels of Alcaloid Contents." Beiträge zur Tabakforschung International/Contributions to Tobacco Research 14, no. 1 (1987): 1–9. http://dx.doi.org/10.2478/cttr-2013-0578.

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AbstractTwo systems of genetic control are involved in the quality and level of total alkaloids in tobacco (Nicotianatabacum L.). A single locus controls the conversion of nicotine to nornicotine and two loci control total alkaloid levels. These levels may be further modified by minor genes or quantitative factors. Breeding lines and cultivars of flue-cured tobacco have been developed with varying levels of total alkaloids (nicotine). Levels of nicotine in tobacco range from near zero in cigar strains up to 4.5 % in Burley varieties. Within the collection of N. tabacumgermplasm and Nicotiana s

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Wink, Michael, and Ludger Witte. "Cell-Free Synthesis of the Alkaloids Ammodendrine and Smipine." Zeitschrift für Naturforschung C 42, no. 3 (1987): 197–204. http://dx.doi.org/10.1515/znc-1987-0304.

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The bipiperidyl alkaloid ammodendrine was detected in 28 plant species as a minor alkaloid besides quinolizidine alkaloids. Cadaverine serves as a precursor for both quinolizidine alkaloids and for ammodendrine, since labelled cadaverine is incorporated into both rings of ammodendrine. Cell-free extracts of Lupinus arboreus and of Pisum sativum, which contain an active diamine oxidase form ammodendrine from cadaverine and pyruvate. In addition to ammodendrine other alkaloids such as smipine, tetrahydroanabasine and tripiperideine could be detected. Possible reaction schemes are discussed.

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Meles, Dewa Ketut, Wurlina Wurlina, and Dewa Putu Anom Adnyana. "Measurement of Alkaloids Achyranthes Aspera Linn Level Using Thin Layer Chromatography Method and High-Performance Liquid Chromatography." KnE Life Sciences 3, no. 6 (2017): 378. http://dx.doi.org/10.18502/kls.v3i6.1146.

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One of the plants with the potential to be developed into a raw material for anti-breast cancer drugs is jarong (Achyranthes aspera linn). Allegedly alkaloid of Achryranthes aspera linn leaves showed anticancer activity in vitro in mice myeloma cells is extremely potent. In vivo study showed that the alkaloid Achyranthes aspera linn causes apoptosis and healing in breast cancer cells in mice induced by benzopyrene. Alkaloids of Achyranthes aspera linn leaves as anticancer been listed on Incestual Property Rights (IPR) since October 12, 2012, with number P00201299839. This study aims to prove t

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Galek, R., E. Sawicka-Sienkiewicz, D. Zalewski, S. Stawiński, and K. Spychała. "Searching for low alkaloid forms in the Andean lupin (Lupinus mutabilis) collection." Czech Journal of Genetics and Plant Breeding 53, No. 2 (2017): 55–62. http://dx.doi.org/10.17221/71/2016-cjgpb.

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The Andean lupin (Lupinus mutabilis Sweet) is the only cultivated species of the genus Lupinus originating from South America. Attempts were made to introduce this species to European soil and climatic conditions. The main disadvantages of the Andean lupin include too long and non-uniform maturation of pods in a plant, dropping flowers and pod buds, and a high alkaloid content (up to 5%). The aim of this study was to identify in post-mutagen treated material genotypes with low alkaloid content in seeds, which would be useful for improving L. mutabilis by breeding. The iodine test was annually

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Huybrechts, Bart, Svetlana V. Malysheva, and Julien Masquelier. "A Targeted UHPLC-MS/MS Method Validated for the Quantification of Ergot Alkaloids in Cereal-Based Baby Food from the Belgian Market." Toxins 13, no. 8 (2021): 531. http://dx.doi.org/10.3390/toxins13080531.

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Following pending new legislation in the European Union setting a maximum of 20 ng g−1 for the total sum of ergot alkaloids in dry cereal-based baby food, a new UHPLC-MS/MS method was developed. It is suitable for the quantification of six ergot alkaloids: Ergocornine, ergocristine, ergometrine, ergosine, ergotamine, α-ergocryptine, and their corresponding epimers. The method is able to reliably detect individual ergot alkaloids at a level as low as 0.5 ng g−1. The method uses a modified QuEChERS extraction approach before UHPLC-MS/MS analysis. The method showed good sensitivity, accuracy, and

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Awad Hamza Abdelmageed, Hatil Hashim Alkamali, and Mohamed Elkheir Abdelrahman. "Identification and Quantification of Novel Metabolites in (Catharanthus roseus (L) G. Don Parental types and their F1, F2 generation." GSC Biological and Pharmaceutical Sciences 30, no. 3 (2025): 272–79. https://doi.org/10.30574/gscbps.2025.30.3.0106.

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This study investigates the variability of alkaloidal compounds in the aerial parts of Catharanthus roseus (periwinkle) parents, and their hybrids at different growth stages. Alkaloids are of significant interest due to their pharmaceutical properties, and understanding their variation across generations can inform breeding strategies. Alkaloid concentrations were analyzed in the aerial parts (stems & leaves) of parental plants and F1 hybrids at the flowering stage, at the fruiting stage for F2 generation. Identification and Quantification of Novel Metabolites was conducted using appropria

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Sidibe, Mamadou Sadialiou, Olimjon Panjiyev, Rikhsivoy ZIYAEV, Sory Fofana, and Golib Shodiyev. "Alcaloides Des Annonacees : Xyloethiopine, Un Nouvel Alcaloide De Xylopia Aethiopica A.Rich." International Journal for Research in Applied Science and Engineering Technology 10, no. 3 (2022): 1635–40. http://dx.doi.org/10.22214/ijraset.2022.41036.

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Abstract: We studied the alkaloid composition of Xylopia aethiopica A. Rich ( Annona-ceae) leaves collected in republic of Guinea and isolated for the first time and identified the 3 benzyltetrahydroisoquinolines alkaloids: armépavine; coclaurine ; Nméthylcoclaurine, and a new alkaloid - xyloethiopine Keywords: Annonaceae; Xylopia aethiopica A. Rich., Alkaloids: benzyltetrahydroisoquinolines: armépavine ; coclaurine ; Nméthylcoclaurine ; xyloethiopine.

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