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Journal articles on the topic 'Friedelin'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Singh, Santosh Kumar, Shweta Shrivastava, Awdhesh Kumar Mishra, et al. "Friedelin: Structure, Biosynthesis, Extraction, and Its Potential Health Impact." Molecules 28, no. 23 (2023): 7760. http://dx.doi.org/10.3390/molecules28237760.

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Pharmaceutical companies are investigating more source matrices for natural bioactive chemicals. Friedelin (friedelan-3-one) is a pentacyclic triterpene isolated from various plant species from different families as well as mosses and lichen. The fundamental compounds of these friedelane triterpenoids are abundantly found in cork tissues and leaf materials of diverse plant genera such as Celastraceae, Asteraceae, Fabaceae, and Myrtaceae. They possess many pharmacological effects, including anti-inflammatory, antioxidant, anticancer, and antimicrobial activities. Friedelin also has an anti-inse

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2

Shi, Bei, Suxian Liu, Aoshuang Huang, et al. "Revealing the Mechanism of Friedelin in the Treatment of Ulcerative Colitis Based on Network Pharmacology and Experimental Verification." Evidence-Based Complementary and Alternative Medicine 2021 (November 2, 2021): 1–14. http://dx.doi.org/10.1155/2021/4451779.

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Objectives. Ulcerative colitis (UC) is a chronic inflammatory disease affecting the colon, and its incidence is rising worldwide. This study was designed to uncover the healing effect of friedelin, a bioactive compound against UC through bioinformatics of network pharmacology and experimental verification of UC model mice. Materials and Methods. Targets of friedelin and potential mechanism of friedelin on UC were predicted through target searching, PPI network establishing, and enrichment analyzing. We explored effects of friedelin on dextran sulfate sodium (DSS)-induced colitis. Severity of U

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3

Chen, Jie, Tianyu Gao, Yanhui Ge, et al. "An efficient harvesting strategy for agarwood based on the correlation analysis of resin formation and leaves dynamic changes induced by integrated induction method." PLOS One 20, no. 7 (2025): e0327516. https://doi.org/10.1371/journal.pone.0327516.

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Agarwood is a resin produced by wounded Aquilaria plants. Aquilaria sinensis (Lour.) Gilg is the original plant source of agarwood in China. Formic acid combined with Botryosphaeria rhodina A13 (FAA13) induces the formation of artificial agarwood as an effective integrated induction method. However, its formation mechanism is still unclear, and the harvesting time of agarwood has not been elucidated. In this work, we analyzed FAA13-induced artificial agarwood and leaves at different time points within one year based on endophytic fungal community, expression of related genes, and secondary met

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4

Setzer, William N., Mary C. Setzer, R. Lynton Peppers, et al. "Triterpenoid Constituents in the Bark of Balanops australiana." Australian Journal of Chemistry 53, no. 9 (2000): 809. http://dx.doi.org/10.1071/ch00066.

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Two new triterpenoid natural products (friedelane-3,21α-diol and friedelane-3α,28,29-triol) have been isolated from the chloroform bark extract of Balanops australiana from Paluma, north Queensland, Australia. The known triterpenoids betulinic acid, friedelin, canophyllol, zeylanol and 21α-hydroxyfriedelan-3-one were also isolated. The structures of the compounds were elucidated on the basis of spectral analysis. A single-crystal X-ray structural analysis has been carried out on 21α-hydroxyfriedelan-3-one.

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5

Tomosaka, Hideyuki, Hideaki Tamimoto, Yuki Tsukagoshi, Yasutsugu Suzuki, Hisako Ooka, and Michiya Ota. "Constituents of Twig Bark of Pear Cultivars (Pyrus species)." Natural Product Communications 7, no. 8 (2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700806.

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Organic solvent extracts from fresh twig bark of Japanese pear cultivars ( Pyrus serotina) Shinko and Nijisseiki, and European pear cultivar ( P. communis) Le Lectier were obtained by maceration with n-hexane and EtOAc, and analyzed in GC-EIMS experiments. In these two Japanese cultivars, the lupeol, betulin, epifriedelinol, friedelin and arbutin contents of Nijisseiki were higher than those of Shinko. In the case of the lupane-type triterpenes, lupeol and betulin, the lupeol content of Japanese pears Shinko and Nijisseiki was higher than that of European pear Le Lectier. The betulin content o

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6

Vivek, Krishna, Sharma Sneh, B. Pareek R., and Singh Pahup. "Terpenoid constituents from some indigenous plants." Journal of Indian Chemical Society Vol. 79, Jun 2002 (2002): 550–52. https://doi.org/10.5281/zenodo.5844305.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, India <em>E-mail</em>: pahupsingh@yahoo.co.uk <em>Manuscript received 2 April 2001, revised 11 September 2001, accepted 16 October 2001</em> Isolation of lupeol acetate, stigmasterol, β-sitasterol, betulin, β-amyrin, lupeol, oleanolic acid from aerial parts and stigmasterol, β-sitosterol, β-amyrin, oleanolic acid from flowers of <em>Pyrostegiα venustα</em>; β-sitosterol, friedelin, friedel-1-en-3-one, lupeol from heartwood of <em>Sαlmαliα mαlαbαricα</

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7

Islam, Quazi Sufia, Md Hossain Sohrab, Suraiya Sharmin, and Choudhury Mahmood Hasan. "Phytochemical Investigation of Calophyllum inophyllum L." Dhaka University Journal of Pharmaceutical Sciences 18, no. 2 (2019): 179–82. http://dx.doi.org/10.3329/dujps.v18i2.43260.

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Repeated chromatographic separation and purification of the dichloromethane-methanol (1:1) extract of the stem bark of Calophyllum inophyllum led to the isolation of four secondary metabolites which were identified as β-friedelin (1), α-friedelan-3-ol (2), 4-hydroxyxanthone (3) and stigmast-5-en-3-one (4) by analysis of their NMR data and comparison with published values Dhaka Univ. J. Pharm. Sci. 18(2): 179-182, 2019 (December)

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8

Pires, Ricardo A., Ivo Aroso, Susana P. Silva, João F. Mano, and Rui L. Reis. "Isolation of Friedelin from Black Condensate of Cork." Natural Product Communications 6, no. 11 (2011): 1934578X1100601. http://dx.doi.org/10.1177/1934578x1100601104.

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Black condensates (BC) are wastes of the insulation corkboard industry that contain several valuable chemicals, including friedelin, a terpene exhibiting biological activity. Herein, we report a straightforward procedure to extract friedelin from BC. Using this procedure, we were able to extract friedelin with yields between 0.4% and 2.9% and to further purify it obtaining purities from 77.0% to 99.3% (HPLC). The initial BC (2 batches), extracted raw product and purified friedelin were analyzed using FTIR. The extraction yields and purities were found to be directly related to the intensity of

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9

Farozi, Alia, Javid Ahmad Banday, and Shakeel Ahmad Shah. "Genicunolide A, B and C: three new triterpenoids from Euphorbia geniculata." Beilstein Journal of Organic Chemistry 11 (December 23, 2015): 2707–12. http://dx.doi.org/10.3762/bjoc.11.291.

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Three new triterpenoids, designated as genicunolide A (1), B (2) and C (3), along with friedelin (4) and friedelinol (5), were isolated from the aerial parts of Euphorbia geniculata. They were characterized as 1β-acetoxy-3β-hydroxy-11α,12α-oxidotaraxer-14-ene, 1β,3β-diacetoxy-21α-hydroxy-11α,12α-oxidotaraxer-14-ene and 3β,9α,20α-trihydroxy-Ψ-taraxast-5-ene, respectively, by spectral and chemical methods.

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10

Tian, Juan, Tao Han та Minjuan Pan. "Friedelin Protects Against Alveolar Epithelial Cells Apoptosis in Lps-Induced Acute Pneumonia in Neonatal Rats by Suppressing NF-κB Activation". Current Topics in Nutraceutical Research 19, № 1 (2020): 58–63. http://dx.doi.org/10.37290/ctnr2641-452x.19:58-63.

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Neonatal pneumonia is caused by inflammation mediated by lipopolysaccharide from gram negative bacteria. This type of pneumonia is characterized by inflammatory and apoptotic responses. In this study, we have examined the effect of friedelin on lipopolysaccharide-induced pneumonia and the role of nuclear factor kappa B in this process. Also, using the human pulmonary alveolar epithelial cells as a model we examined the effect of lipopolysaccharide on the cell apoptosis and its protection by friedelin. The results show that friedelin prevented lipopolysaccharide-induced acute pneumonia in neona

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11

Bicalho, Keylla U., Mariana M. Santoni, Philipp Arendt, et al. "CYP712K4 Catalyzes the C-29 Oxidation of Friedelin in the Maytenus ilicifolia Quinone Methide Triterpenoid Biosynthesis Pathway." Plant and Cell Physiology 60, no. 11 (2019): 2510–22. http://dx.doi.org/10.1093/pcp/pcz144.

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Abstract The native Brazilian plant Maytenus ilicifolia accumulates a set of quinone methide triterpenoids with important pharmacological properties, of which maytenin, pristimerin and celastrol accumulate exclusively in the root bark of this medicinal plant. The first committed step in the quinone methide triterpenoid biosynthesis is the cyclization of 2,3-oxidosqualene to friedelin, catalyzed by the oxidosqualene cyclase friedelin synthase (FRS). In this study, we produced heterologous friedelin by the expression of M. ilicifolia FRS in Nicotiana benthamiana leaves and in a Saccharomyces cer

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12

Pranab, Ghosh, and Chakraborty Prasanta. "Reaction of 2-bromo-3-keto triterpenoids Deoxygenation and simultaneous debromination by Huang-Minion reduction condition." Journal of Indian Chemical Society Vol. 90, Apr 2013 (2013): 519–24. https://doi.org/10.5281/zenodo.5771267.

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Department of Chemistry, University of North Bengal, Darjeeling-734 013, West Bengal, India <em>E-mail</em> : pizy12@yahoo.com     Fax : 91-353-2699001 <em>Manuscript received 11 November 2010, revised 09 March 2012, accepted 07 June 2012</em> On heating 2α-bromo/2,2-dibromo lupanone (1/1a) and 2α-bromo/4α-bromo friedelin (2/2a) with diethylene glycol and hydrazine hydrate (Huang-Minion modified Wolff-Kishner reaction) under reflux produced lupane (3) and-friedelane (4), respectively.  

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13

Gowtham, Hittanahallikoppal Gajendramurthy, Faiyaz Ahmed, Satish Anandan, et al. "In Silico Computational Studies of Bioactive Secondary Metabolites from Wedelia trilobata against Anti-Apoptotic B-Cell Lymphoma-2 (Bcl-2) Protein Associated with Cancer Cell Survival and Resistance." Molecules 28, no. 4 (2023): 1588. http://dx.doi.org/10.3390/molecules28041588.

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In the present study, the binding affinity of 52 bioactive secondary metabolites from Wedelia trilobata towards the anti-apoptotic B-cell lymphoma-2 (Bcl-2) protein (PDB: 2W3L) structure was identified by using in silico molecular docking and molecular dynamics simulation. The molecular docking results demonstrated that the binding energies of docked compounds with Bcl-2 protein ranged from −5.3 kcal/mol to −10.1 kcal/mol. However, the lowest binding energy (−10.1 kcal/mol) was offered by Friedelin against Bcl-2 protein when compared to other metabolites and the standard drug Obatoclax (−8.4 k

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14

Fun, Hoong-Kun, Nawong Boonnak та Suchada Chantrapromma. "A cocrystal of friedelan-3β-ol and friedelin (0.75/0.25)". Acta Crystallographica Section E Structure Reports Online 63, № 4 (2007): o2014—o2016. http://dx.doi.org/10.1107/s1600536807013979.

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15

Parveen, Mehtab, Sayed Hasan Mehdi, Raza Murad Ghalib, Mahboob Alam, Rokiah Hashim, and Othman Sulaiman. "SYNTHESIS, CHARACTERIZATION AND ANTIMICROBIAL ACTIVITY OF FRIEDELIN [2, 3-d] SELENADIAZOLE." Indonesian Journal of Chemistry 9, no. 2 (2010): 285–88. http://dx.doi.org/10.22146/ijc.21554.

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The new 1, 2, 3, selenadiazole derivative (3) was prepared from friedelin (1) via the corresponding semicarbazone (2) using Lalezari cyclization. The compounds were prepared, separated and characterized on the basis of microanalysis and spectral studies. The isolated friedelin and its selenadiazole were screened in vitro for their antimicrobial activities against various pathogenic bacterial were found to be highly active against all the selected pathogens. Compound 3 showed an inhibition zone of 14 mm and 12 mm respectively against highly resistant S. albus and C. albicans. A general mechanis

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16

Seupel, Raina, Alexander Roth, Katrin Steinke, et al. "Friedelin aus Kork." Chemie in unserer Zeit 49, no. 1 (2014): 60–72. http://dx.doi.org/10.1002/ciuz.201400690.

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17

Alves, Thaís, Tatiana Souza-Moreira, Sandro Valentini, Cleslei Zanelli, and Maysa Furlan. "Friedelin in Maytenus ilicifolia Is Produced by Friedelin Synthase Isoforms." Molecules 23, no. 3 (2018): 700. http://dx.doi.org/10.3390/molecules23030700.

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18

Hansen, Nikolaj L., Karel Miettinen, Yong Zhao, et al. "Integrating pathway elucidation with yeast engineering to produce polpunonic acid the precursor of the anti-obesity agent celastrol." Microbial Cell Factories 19, no. 1 (2020): 15. https://doi.org/10.1186/s12934-020-1284-9.

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<strong>Background: </strong>Celastrol is a promising anti-obesity agent that acts as a sensitizer of the protein hormone leptin. Despite its potent activity, a sustainable source of celastrol and celastrol derivatives for further pharmacological studies is lacking.<strong>Results: </strong>To elucidate the celastrol biosynthetic pathway and reconstruct it in <i>Saccharomyces cerevisiae</i>, we mined a root-transcriptome of <i>Tripterygium wilfordii</i> and identified four oxidosqualene cyclases and 49 cytochrome P450s as candidates to be involved in the early steps of celastrol biosynthesis.

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19

Siraj, Md Afjalus, Md Rahman, Ghee Tan, and Veronique Seidel. "Molecular Docking and Molecular Dynamics Simulation Studies of Triterpenes from Vernonia patula with the Cannabinoid Type 1 Receptor." International Journal of Molecular Sciences 22, no. 7 (2021): 3595. http://dx.doi.org/10.3390/ijms22073595.

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A molecular docking approach was employed to evaluate the binding affinity of six triterpenes, namely epifriedelanol, friedelin, α-amyrin, α-amyrin acetate, β-amyrin acetate, and bauerenyl acetate, towards the cannabinoid type 1 receptor (CB1). Molecular docking studies showed that friedelin, α-amyrin, and epifriedelanol had the strongest binding affinity towards CB1. Molecular dynamics simulation studies revealed that friedelin and α-amyrin engaged in stable non-bonding interactions by binding to a pocket close to the active site on the surface of the CB1 target protein. The studied triterpen

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20

Mazzeu, Bruna F., Tatiana M. Souza-Moreira, Andrew A. Oliveira, et al. "The Methionine 549 and Leucine 552 Residues of Friedelin Synthase from Maytenus ilicifolia Are Important for Substrate Binding Specificity." Molecules 26, no. 22 (2021): 6806. http://dx.doi.org/10.3390/molecules26226806.

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Friedelin, a pentacyclic triterpene found in the leaves of the Celastraceae species, demonstrates numerous biological activities and is a precursor of quinonemethide triterpenes, which are promising antitumoral agents. Friedelin is biosynthesized from the cyclization of 2,3-oxidosqualene, involving a series of rearrangements to form a ketone by deprotonation of the hydroxylated intermediate, without the aid of an oxidoreductase enzyme. Mutagenesis studies among oxidosqualene cyclases (OSCs) have demonstrated the influence of amino acid residues on rearrangements during substrate cyclization: l

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21

Mossi, AJ, M. Mazutti, N. Paroul, et al. "Chemical variation of tannins and triterpenes in Brazilian populations of Maytenus ilicifolia Mart. Ex Reiss." Brazilian Journal of Biology 69, no. 2 (2009): 339–45. http://dx.doi.org/10.1590/s1519-69842009000200015.

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Maytenus ilicifolia and Maytenus aquifolia species are widely used as a cicatrisation agent, an anti-spasmodic, contraceptive, antiulcerogenic, diuretic and analgesic. Considering the importance of these species in popular medicine, this work is focused on the determination of the chemical content of tannins and the triterpenes friedelan-3-one, friedelan-3-ol and friedelin in 15 native populations of Maytenus ilicifolia distributed in the south and mind-west regions of Brazil. Correlation of the concentration of these compounds with the environmental parameters such as average annual temperatu

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22

Mkounga, Pierre, Hermine L. D. Maza, Blandine M. W. Ouahouo, et al. "New lupan-type triterpenoids." Zeitschrift für Naturforschung C 71, no. 11-12 (2016): 381–86. http://dx.doi.org/10.1515/znc-2015-0235.

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Abstract Three new lupan-type triterpernoid derivatives, namely globimetulin A (1), B (2) and C (3), were isolated from the shoot of Globimetula dinklagei (Loranthaceae), a hemiparasitic plant growing on Manihot esculenta, along with five known compounds: friedelin (4), friedelan-3-ol (5), 28-hydroxyfriedelin (6), 4-hydroxy-3,5-dimethoxybenzoic acid (7) and (1R,5S,7S)-7-[2-(4-hydroxyphenyl)ethyl]-2,6-dioxabicyclo[3.3.1]nonan-3-one (8). The structures of the new compounds were elucidated by detailed analyses of their MS, IR, 1D and 2D NMR spectral data and chemical evidence. Some of these compo

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23

SUNIL, K. TALAPATRA, MANDAL KABITA та TALAPATRA BANI. "Jatrocurin, a New Tetracyclic Triterpene from Jαtrophα curcαs". Journal of Indian Chemical Society Vol.70, Jun 1993 (1993): 543–48. https://doi.org/10.5281/zenodo.5913983.

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UGC Centre of Advanced Studies on Natural Products, Department of Chemtstry, University College of Science, 92 Acharya Prafulla Chandra Road, Calcutta-700 009 <em>Manuscript received 5 November 1992, accepted 23 February 1993</em> From the stem of<em> Jα</em><em>trophα</em><em> curcα</em><em>s</em> Linn. (fam. Euphorbiaceae) were isolated scopoletin methyl ether, friedelin, <em>epi</em>-friedelinol and a new tetracyclic triterpene ester designated jatrocurin which was shown to be 4ß-demethyl- 24-methylenecycloartanyl 3<em>ß</em>-<em>p</em>-hydroxy-<em>m</em>-metho

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24

Nishihama, Tadaaki, and Takeyoshi Takahashi. "Basic Autoxidation of Friedelin." Bulletin of the Chemical Society of Japan 60, no. 6 (1987): 2117–25. http://dx.doi.org/10.1246/bcsj.60.2117.

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25

Chou, Shen-Chieh, Vivek Krishna, and Chang-Hung Chou. "Hydrophobic Metabolites from Rhododendron formosanum and their Allelopathic Activities." Natural Product Communications 4, no. 9 (2009): 1934578X0900400. http://dx.doi.org/10.1177/1934578x0900400906.

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Eighteen components were isolated from the methanolic extract of leaves of Rhododendron formosanum Hemsl. (Ericaceae), an endemic species in Taiwan, and evaluated for their allelopathic properties. Of the isolated compounds, 3 β-friedelinol, 5,6β-epoxy-5β-stigmastan-3β-ol, 5,6α-epoxy-5α-stigmastan-3 β-ol, lupeol and ursolic acid revealed inhibitory effects at 10−4 M or above, whereas α-tocopherol, friedelin and β-amyrin acetate exhibited stimulatory effects on the radicle growth of the test plants at the same concentration or above. However, squalene and α-amyrin showed either a stimulatory or

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26

Menon, Lekshmi N., Ganapathy Sindhu, Kozhiparambil G. Raghu, and Koranappallil B. Rameshkumar. "Chemical Composition and Cytotoxicity of Garcinia rubro-echinata, a Western Ghats Endemic Species." Natural Product Communications 13, no. 11 (2018): 1934578X1801301. http://dx.doi.org/10.1177/1934578x1801301121.

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Phytochemical analysis of the leaves of Garcinia rubro-echinata Kosterm., an endemic species to the Western Ghats, India yielded the triterpenoid friedelin (1), the flavonoids naringenin (2), apigenin (3) and (-)-epicatechin (7), the biflavonoids podocarpusflavone A (5) and amentoflavone (6), and the dihydrochalcone phloretin (4) and phloretin-4'-O-β-D-glycoside (8). The compounds 4 and 8 were isolated from the genus Garcinia for the first time. Validated HPTLC estimation showed 0.21% amentoflavone and 0.18% friedelin in the plant. Cytotoxicity of the leaf extract and the compounds 5 and 6 aga

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27

Zermiani, Tailyn, Antonio A. S. Junior, Renê A. Ferreira, et al. "Seasonal variation of gastroprotective terpenoids in Maytenus robusta (Celastraceae) quantified by gas chromatography-flame ionization detection (GC-FID)." Zeitschrift für Naturforschung C 71, no. 11-12 (2016): 369–73. http://dx.doi.org/10.1515/znc-2015-0185.

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Abstract The triterpenes friedelin (1), β-friedelinol (2) and 3,15-dioxo-21α-hydroxyfriedelane (3) in the aerial parts of Maytenus robusta, a Brazilian medicinal plant with antiulcer potential, were seasonally quantified by gas chromatography flame-ionization detection (GC-FID) using an external standard. The method was found to be linear, precise and sensitive. Compounds 1 and 2 were found in M. robusta leaves and branches, with highest concentrations in the leaves collected in autumn, i.e. 3.21 ± 0.16 and 12.60 ± 1.49 mg g−1 dry weight of 1 and 2, respectively. On the other hand, compound 3

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Van, Nguyen Thi Hong, Do Huu Nghi, Pham Cao Bach, et al. "Triterpenoids from the leaves of Camellia chrysantha growing in Quang Ninh (Vietnam) and their activities on main protease (M^pro) and ACE2." Vietnam Journal of Chemistry 61, S3 (2023): 140–47. http://dx.doi.org/10.1002/vjch.202300083.

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AbstractCamellia chrysantha (Hu) Tuyama (Theaceae) is used as a high‐class herbal tea called “yellow camellia”, “golden camellia”, “camellia queen”. Phytochemical investigation of the leaves of C. chrysantha led to the isolation of four triterpenoids β‐amyrin hexanoate (1), friedelin (2), friedelanol (3), β‐amyrin (4) together with one steroid chondrillasterol (5). Their chemical structures were established based on analysis of their spectroscopic data including 1D, 2D‐NMR, MS data and comparing with literatures. It is the first time β‐amyrin hexanoate and chondrillasterol were isolated from t

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Declercq, J. P., L. Van Puyvelde, N. De Kimpe, M. Nagy, G. Verhegge, and R. De Vierman. "Redetermination of the structure of friedelin." Acta Crystallographica Section C Crystal Structure Communications 47, no. 1 (1991): 209–11. http://dx.doi.org/10.1107/s0108270190007454.

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El-Shazly, Assem, Afaf El-Sayed, and Eman Fikrey. "Department of Pharmaceutical Care, General Hospital of Chinese PLA, Beijing, 100853, P. R. China." Zeitschrift für Naturforschung C 67, no. 7-8 (2012): 353–59. http://dx.doi.org/10.1515/znc-2012-7-801.

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Column chromatography of the light petroleum fraction from the methanolic extract of the stem bark of Salix tetrasperma Roxb. (Salicaceae) resulted in the isolation of β-sitosterol acetate, friedelin, 3β-friedelinol, β-amyrin, β-sitosterol, β-sitosterol-O-glucoside in addition to palmitic acid. From the dichloromethane fraction of the leaves, catechol and tremulacin were isolated. Salicin and its derivatives tremuloidin and 2’-O-p-(E)-coumaroyl salicin were isolated from the ethyl acetate fraction of the leaves. The isolated compounds were identified by MS, and 1D NMR (1H and 13C) and 2D NMR (

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Darwati, Darwati, Nurlelasari Nurlelasari, Tri Mayanti, and Unang Supratman. "STUDI EKSTRAK n-HEKSANA DARI KULIT BATANG KANDIS HUTAN (Garcinia cymosa)." Jurnal Penelitian Hasil Hutan 39, no. 3 (2021): 148–54. http://dx.doi.org/10.20886/jphh.2021.39.3.148-154.

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Tanaman dari Garcinia (Famili Guttiferae) yang tumbuh di hutan tropis Indonesia memiliki potensi kandungan senyawa triterpenoid. Garcinia cymosa telah dilaporkan memiliki potensi sebagai sumber utama senyawa triterpenoid yang memiliki aktivitas biologis yang bermanfaat, seperti anti-inflamasi, antibakteri, antijamur, anti-oksidan, sitotoksik, dan anti-HIV. Saat ini data dan informasi mengenai senyawa triterpenoid yang terkandung di dalam G. cymosa relatif masih sangat sedikit. Tulisan ini mempelajari senyawa triterpenoid dari kulit batang G. cymosa. Kulit batang G. cymosa dimaserasi dengan men

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Jaipetch, Thaworn, Sakchai Hongthong, Samreang Bunteang, et al. "A New Ellagic Acid From the Leaves and Twigs of Irvingia malayana." Natural Product Communications 14, no. 5 (2019): 1934578X1984816. http://dx.doi.org/10.1177/1934578x19848164.

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A phytochemical investigation of the leaves and twigs of Irvingia malayana led to the isolation of a new 3,3′,4′-tri- O-methylellagic acid-6″-acetoxy-4- O-β-glucoside (1), along with 3,3′,4′-tri- O-methylellagic acid (2), 3,3′-di- O-methylellagic acid-4- O-β-xyloside (3), 3,3′,4′-tri- O-methylellagic acid-4-β -O-glucoside (4), friedelin (5), friedelinol (6), methyl-3,4,5-trihydroxybenzoate (7), 5,7,4′-trihydroxyflavone-8- C-β-glucopyranoside (8), 5,7,3′,4′-tetrahydroxyflavone-8- C-β-glucopyranoside (9), and 5,3′,4′-trihydroxyflavone-6- C-β-glucopyranoside (10). Their structures were elucidated

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Arfan, Mohammad, Naila Raziq, Ivana Aljancic, and Slobodan Milosavljevic. "Secondary metabolites of Hypericum monogynum from Pakistan." Journal of the Serbian Chemical Society 74, no. 2 (2009): 129–32. http://dx.doi.org/10.2298/jsc0902129a.

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4-Chlorobenzoic acid (1), quercitrin (2), astilbin (3), along with ?-sitosterol, ?-sitosterol, friedelin and ?-amyrin were isolated from the aerial parts of Hypericum monogynum. Whereas compound 1 was isolated for the first time from natural sources, flavanonol 3 was not found before in these species.

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Shaari, K., AI Gray, DCR Hockless, PG Waterman, and AH White. "Structural Studies of Kaurane Diterpenes From Ryparosa acuminata (Flacourtiaceae)." Australian Journal of Chemistry 46, no. 5 (1993): 739. http://dx.doi.org/10.1071/ch9930739.

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Two new diterpenes have been isolated from the twigs of Ryparosa acuminata ( Flacourtiaceae ), and identified as 16α,19-dihydroxykauran-20-oic acid δ- lactone and 16α-hydroxykaurane-19,20-dial. Friedelin and eudesmin were also isolated. The structure of the lactone was confirmed by X-ray crystallography.

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35

Queiroga, Carmen Lucia, Guilherme Faria Silva, Patrı́cia Corrêa Dias, Ana Possenti та João Ernesto de Carvalho. "Evaluation of the antiulcerogenic activity of friedelan-3β-ol and friedelin isolated from Maytenus ilicifolia (Celastraceae)". Journal of Ethnopharmacology 72, № 3 (2000): 465–68. http://dx.doi.org/10.1016/s0378-8741(00)00237-3.

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Srinivasan, R., M. J. N. Chandrasekar, and M. J. Nanjan. "Phytochemical Investigations ofCaesalpinia digynaRoot." E-Journal of Chemistry 8, no. 4 (2011): 1843–47. http://dx.doi.org/10.1155/2011/630375.

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Phytochemical examination of petroleum ether extract ofCaesalpinia digynaroot resulted in the isolation of four compounds namely, friedelin, hexacosanoic acid,β-sitosterol and stigmasterol. These compounds have been characterized on basis of physical and spectral data. All the four compounds are being reported for the first time from this plant

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37

Elangovan, Nandhini, Chakravarthi P, and Kanimozhi S. "Molecular docking study of phytochemical compounds from Kustakudori ennai as a potential anti-alopecia treatment." International Journal of Ayurvedic Medicine 15, no. 2 (2024): 414–19. http://dx.doi.org/10.47552/ijam.v15i2.4320.

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Background: In the case of alopecia, the scalp's hair may completely or partially lost. The 5--reductase enzyme has been inhibited as a recent prophylactic treatment. Diahydrotestosterone, a more potent metabolite of testosterone, is produced when the enzyme 5--reductase is inhibited. Literature: Kushtakudori ennai, Siddha poly herbal drug is used as a Alopecia medicine mentioned in the literature Prana rakshamirtha sindhu.This research aimed to test activity of 9 known compounds contained within the herbs of Kushtakudori ennai as anti-alopecia. Methodology: Utilizing molecular docking and the

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AMARENDRA, PATRA, K. CHAUDHURI SWAPAN, and RÜEGGER HEINZ. "Complete 13C and 1H Spectral Assignments of Friedelin by INADEQUATE and Heteronuclear (13C-1H) Correlation Experiments." Journal of Indian Chemical Society Vol. 67, May 1990 (1990): 394–97. https://doi.org/10.5281/zenodo.6163502.

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Department of Chemistry, University College of Science, Calcutta-700 009 <em>Manuscript received 12 April 1989, revised 15 November 1989, accepted 21 November 1989</em> Complete carbon-13 and proton spectral analyses of friedelin have been made using INADEQUATE (or CCCP) and heteronuclear (<sup>13</sup>C-<sup>1</sup>H) correlation experiments.

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39

Rahman, Atta-ur, Seema Zareen, M. Iqbal Choudhary, M. Nadeem Akhtar, Atta-ur Rahman, and F. N. Ngounou. "Some Chemical Constituents Of Terminalia Glaucescens And Their Enzymes Inhibition Activity." Zeitschrift für Naturforschung B 60, no. 3 (2005): 347–50. http://dx.doi.org/10.1515/znb-2005-0320.

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A new triterpenoid, glaucinoic acid (2α, 3β, 19α, 24-tetrahydroxyolean-12-en-30-oic acid) (1) along with several known compounds, arjunic acid (2), arjungenin (3), sericoside (4), and friedelin (5) were isolated from the stem barks of Terminalia glaucescens. These compounds showed β - glucuronidase inhibitory activity. The structures were identified on the basis of spectroscopic techniques

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Ngo, Quoc Luan, Phu Thach Nguyen, Van Minh Em Nguyen, et al. "Isolation and identification of triterpenoid compounds from Couroupita guianensis Aubl." Can Tho University Journal of Science 15, no. 1 (2023): 91–97. http://dx.doi.org/10.22144/ctu.jen.2023.012.

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In this report, the extracts from the fruit and leaves of Couroupita guianensis were isolated using chromatographic methods and investigated for chemical composition. Four triterpenoid compounds were isolated and identified as betulinic acid, oleanolic acid, β-amyrin and friedelin. Their chemical structures were interpreted based on modern spectra such as MS, NMR and compared with previously published spectral data.

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Pranab, Ghosh, Ghosh Ashim, Saha Bittu, and P. Pradhan B. "Oxidation of oxime derivative of friedelin with hydrogen peroxide in presence of selenium dioxide in tert-butanol and antimicrobial activity of the isolated compounds." Journal of Indian Chemical Society Vol. 93, Sep 2016 (2016): 1103–6. https://doi.org/10.5281/zenodo.5639447.

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Department of Chemistry, University of North Bengal, P.O. North Bengal University, Darjeeling-734 013, West Bengal, India E-mail : pizy12@yahoo.com Fax : 91-353-2699001 Manuscript received online 30 August 2013, accepted 03 June 2016 Oxime derivative (1a) of friedelin (1) on oxidation with hydrogen peroxide and selenium dioxide in tertiary butanol furnishes an <strong>ɛ</strong>-lactone, friedelolactone (2) and 2,3-seco-friedelonic acid (3). The structures of these compounds have been fully established on the basis of spectral data (IR, MS, PMR, and <sup>13</sup>C NMR). Antimicrobial activity

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42

Nordby, Harold E., and Roy E. McDonald. "Friedelin, the Major Component of Grapefruit Epicuticular Wax." Journal of Agricultural and Food Chemistry 42, no. 3 (1994): 708–13. http://dx.doi.org/10.1021/jf00039a021.

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43

DECLERCQ, J. P., L. VAN PUYVELDE, N. DE KIMPE, M. NAGY, G. VERHEGGE, and R. DE VIERMAN. "ChemInform Abstract: Redetermination of the Structure of Friedelin." ChemInform 22, no. 16 (2010): no. http://dx.doi.org/10.1002/chin.199116251.

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He, Lan, Xiangjun Yue, Yaozu Chen, Xuan Pan, Yongjie Wu, and Futian Tang. "Chemical Modification of Friedelin and Anti-Inflammatory Activity." Chinese Journal of Applied Chemistry 13, no. 5 (1996): 67–69. http://dx.doi.org/10.3724/j.issn.1000-0518.1996.5.67.

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He, Lan, Xiangjun Yue, Yaozu Chen, Xuan Pan, Yongjie Wu, and Futian Tang. "Chemical Modification of Friedelin and Anti-Inflammatory Activity." Chinese Journal of Applied Chemistry 13, no. 5 (1996): 67–69. http://dx.doi.org/10.3724/j.issn.1000-0518.1996.5.6769.

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46

ZOGHBI, Maria das G. B., Patrícia D. de D. Β. LIMA, Maria do P. Socorro C. da CUNHA, and Angelo da C. PINTO. "PRENYLATED XANTHONES FROM Rheedia acuminata." Acta Amazonica 23, no. 2-3 (1993): 181–85. http://dx.doi.org/10.1590/1809-43921993233185.

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Pyranojacareubin; 1,5-dihydroxy-6',6'-dimethyl-2H-pyran(2',3':6,7) -6",6"-dim-ethyI-2H,4H-pyran(2",3":2,3)xanthone and a new xanthone l,6-dihydroxy-5-methoxy-6',6'-dim-ethyl-2H-pyran(2',3':3,2)-7-(3,3-dimethylprop-2-enyl)xanthone were isolated from the ether extract of the root bark of Rheedia acuminata together with friedelin and friedelanol.

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47

ZOGHBI, Maria das G. B., Patrícia D. de D. B. LIMA, Maria do P. Socorro C. da CUNHA, and Angelo da C. PINTO. "PRENYLATED XANTHONES FROM Rheedia acuminata (reprinted from Acta Amazônica, 23(2/3):181-185)." Acta Amazonica 24, no. 1-2 (1994): 53–57. http://dx.doi.org/10.1590/1809-43921994242058.

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Pyranojacareubin; 1,5-dihydroxy-6',6'-dimethyl-2H-pyran(2,,3':6,7) -6",6"-dime-thyl-2H,4H-pyran(2",3":2,3)xanthone and a new xanthone l,6-dihydroxy-5-methoxy-6',6'-dime-thyl-2H-pyran(2',3':3,2)-7-(3,3-dimethylprop-2-enyl)xanthone were isolated from the ether extract of the root bark of Rheedia acuminata together with friedelin and friedelanol.

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48

Niero, Rivaldo, Renata Moser, Ana C. B. Busato, Valdir Chechinel Filho, Rosendo A. Yunes, and Ademir Reis. "A Comparative Chemical Study of Maytenus ilicifolia Mart. Reiss and Maytenus robusta Reiss (Celastraceae)." Zeitschrift für Naturforschung C 56, no. 1-2 (2001): 158–62. http://dx.doi.org/10.1515/znc-2001-1-224.

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Abstract This work describes a comparative qualitative and quantitative chemical analysis of Maytenus ilicifolia and Maytenus robusta (Celastraceae), extracts by high-resolution gas chromatography (HRGC), using external standards as the method of determination and thin layer chromatographic (TLC). The results show that both plants have a similar chromatographic profile. However, M. robusta exhibited about three times higher concen tration of triterpene friedelin than M. ilicifolia.

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49

R., Jain, and Nagpal S. "Chemical constituents of the roots of Kirganelia reticulata." Journal of Indian Chemical Society Vol. 79, Sep 2002 (2002): 776–77. https://doi.org/10.5281/zenodo.5844630.

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Department of Chemistry, University of Rajasthan, Jaipur-302 004, India <em>Fax : </em>91-141-510880 <em>Manuscript received 13 March 2001, revised 11 September 2001, accepted 23 April 2002</em> Chemical investigation of the roots of <em>Kirganelia reticulata </em>afforded octacosane, tricosyl alcohol, tetracosyl alcohol, sorghumol acetate, friedelin, epifriedelinol, sorghumol, ß-sitosterol, kokoonol, stigmasta-5,6-dihydro-22-en-3ß-ol and tricin.

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Sofidiya, Margaret O., Elizabeth Taiwo, Victoria Awolola, James Habila, and Neil A. Koorbanally. "Gastroprotective Effect and Chemical Constituents of Flabellaria paniculata (Malpighiaceae)." Natural Product Communications 14, no. 7 (2019): 1934578X1986034. http://dx.doi.org/10.1177/1934578x19860342.

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Leaves from Flabellaria paniculata Cav (Malpighiaceae) are used in traditional medicine for wound dressing, and to treat ulcers and inflammation in Nigeria. The present study evaluates the gastroprotective activity of the ethyl acetate fraction of the methanolic leaf extract and reports on the chemical constituents from the fraction. The methanolic crude extract and solvent fractions (100 mg/kg, PO) were screened using an ethanol-induced ulcer model. The activity of the most active EtOAc fraction (25, 50, and 100 mg/kg, PO) was further evaluated in indomethacin and pylorus ligation-induced ulc

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