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Journal articles on the topic 'Cholestane'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Arnoštová, Libuše, Ivan Černý, Vladimír Pouzar та Pavel Drašar. "Synthesis of 5α-Cholestane Type Glycoside Sulfates". Collection of Czechoslovak Chemical Communications 58, № 5 (1993): 1180–90. http://dx.doi.org/10.1135/cccc19931180.

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Synthesis of steroid glycoside sulfates sulfated both on the steroid skeleton and in sugar part are presented. Sodium salts of 5α-cholestane-3β,6α-diol 6-β-D-glucoside 3-sulfate V and 3-β-D-glucoside 6-sulfate XI were prepared from 3β-(2-tetrahydropyranyloxy)-5α-cholestan-6α-ol (I) using acetyl and methoxymethyl groups for temporary protection. Sulfation in the sugar part was at first checked in pregnane series and triethylammonium salts of 3β-(β-D-glucopyranosyloxy)pregn-5-en-20-one 6'-sulfate (XXVI) and 4'-sulfate 2',3'-diacetate XXVII were prepared. Application of the method on cholestane d

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2

Al-Hassan, Jassim M., Mohammad Afzal, Sosamma Oommen, Yuan Fang Liu, Meraj Khan, and Cecil Pace-Asciak. "Oxidized Cholesterol Derivatives in Fraction B Prepared from Gulf Catfish (Arius bilineatus, Val.) Skin Regulate Calcium Response and Neutrophil Extracellular Traps (NETs) Formation." Biomedicines 12, no. 7 (2024): 1380. http://dx.doi.org/10.3390/biomedicines12071380.

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In this study, we present in vitro actions of pure commercial preparations of oxidized and/or dehydrated metabolites of cholesterol (OS) identified in the lipid fraction of Fraction B (FB) prepared from a catfish skin preparation on calcium transients and on the formation of human neutrophil extracellular traps (NETs). These investigations are part of an ongoing effort to understand the important roles these compounds play as components of FB when FB is applied to accelerate the healing of wounds and the healing of highly infected non-healing diabetic foot ulcers, without the use of antibiotic

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3

Morzycki, Jacek W., Agnieszka Gryszkiewicz, Zenon Lotowski та Wojciech J. Szczepek. "Reduction of 2-Nitro-5α-cholestan-3-one, Its Enol Tautomer and 2-Nitro-5α-cholest-2-en-3-amine Derivatives. Synthesis of Bis-Steroidal Pyrazines". Collection of Czechoslovak Chemical Communications 63, № 10 (1998): 1589–96. http://dx.doi.org/10.1135/cccc19981589.

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Reduction of 2α-nitro-5α-cholestan-3-one (4), its enol tautomer (3a) and 3-acetylamino-2-nitro-5α-cholest-2-ene (2) was studied. The latter compound was reduced with zinc in acetic acid to 3β-acetylamino-5α-cholestan-2-one (8). The similar reaction of 3a or 4 led to 2α-amino-5α-cholestan-3-one (11a), that may be trapped as N-formyl derivative. When crude 11a was subjected to air oxidation, pyrazino[2',3':2,3;5',6':2,3]bis(5α-cholestane) (9) was obtained.

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4

Starý, Ivo, and Pavel Kočovský. "Synthesis of some allylic acetoxy derivatives in the steroid series." Collection of Czechoslovak Chemical Communications 50, no. 5 (1985): 1227–38. http://dx.doi.org/10.1135/cccc19851227.

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A synthesis is reported of 1,2- and 5,6-unsaturated cholestane derivatives bearing an acetoxy group in allylic position (i.e. 3 and 7) and containing further functional groups. A simple strategy for synthesis of 3α-substituted 5-cholestenes is devised.

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5

Kohout, Ladislav. "7-Oxo-7a-oxa-brassinosteroids with Cholestane Side-Chain." Collection of Czechoslovak Chemical Communications 59, no. 5 (1994): 1219–25. http://dx.doi.org/10.1135/cccc19941219.

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New 7-oxo-7a-oxa analogs of brassinolide with cholestane side-chain were prepared. Analogs VIII and IX with 2,3-diol grouping exhibit a weak brassinolide activity. Of the synthesized compounds, the highest brassinolide activity was found for 3α,4α-dihydroxy-7a-oxa-B-homo-5α-cholestan-7-one (X).

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6

Pouzar, Vladimír, Pavel Drašar, Ivan Černý та Miroslav Havel. "Preparation and absolute configuration at C(22) of 21,26,27-trinor-5α-cholestan-25→22-olide derivatives". Collection of Czechoslovak Chemical Communications 50, № 4 (1985): 869–77. http://dx.doi.org/10.1135/cccc19850869.

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Epimeric 21,26,27-trinor-5α-cholestan-25→22-olides (X and XVII), 21,26,27-trinor-5α-cholest-23-en-25→22-olides (XV and XXII), and their 23-methyl derivatives XVI and XXIII were prepared by lengthening the side chain in 5α-pregnan-21-al (I). On the basis of CD spectra and chemical correlations with 21,26,27-trinor-5α-cholestane-22,25-diols, the configuration 22S was ascribed to lactones X, XXII and XXIII whereas lactones XV, XVI and XVII were assigned the 22R configuration.

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7

Ngoc, Ninh Thi, Tran Thi Hong Hanh, Nguyen Xuan Cuong, et al. "CHOLESTANE-TYPE STEROIDS FROM THE OCTOCORAL Verrucella corona." Vietnam Journal of Science and Technology 56, no. 4A (2018): 279. http://dx.doi.org/10.15625/2525-2518/56/4a/12754.

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Using various chromatographic separations, three cholestane-type steroids were isolated from the methanol extract of the octocoral Verrucella corona. Their structures were elucidated to be (22E)-cholesta-5,22-dien-3β-ol-7-one (1), trans-liagosterol (2), and guggulsterol-II (3), by detailed analysis of the 1D and 2D-NMR data as well as comparison with those reported. Among them, compound 2 showed significant cytotoxicity against eight human cancer cell lines as HepG2, HL-60, KB, LNCaP, LU-1, MCF7, SK-Mel2, and SW480.

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8

Fricker, G., V. Dubost, K. Finsterwald, and J. L. Boyer. "Characteristics of bile salt uptake into skate hepatocytes." Biochemical Journal 299, no. 3 (1994): 665–70. http://dx.doi.org/10.1042/bj2990665.

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The substrate specificity for the transporter that mediates the hepatic uptake of organic anions in freshly isolated hepatocytes of the elasmobranch little skate (Raja erinacea) was determined for bile salts and bile alcohols. The Na(+)-independent transport system exhibits a substrate specificity, which is different from the specificity of Na(+)-dependent bile salt transport in mammals. Unconjugated and conjugated di- and tri-hydroxylated bile salts inhibit uptake of cholyltaurine and cholate competitively. Inhibition is significantly greater with unconjugated as opposed to glycine- or taurin

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9

Findlay, John A., and Ashok D. Patil. "Novel sterols from the finger sponge Haliclonaoculata." Canadian Journal of Chemistry 63, no. 9 (1985): 2406–10. http://dx.doi.org/10.1139/v85-398.

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From the finger sponge, Haliclonaoculata (Linnaeus), six new polar sterols have been isolated and their structures determined by chemical and spectroscopic means. These are 3β-hydroxy-cholesta-5,25-dien-24-one (2), 3β-hydroxy-24-methylene-5-cholesten-7-one (6), 24-methylene-5-cholesten-3β,7β-diol (9), 24-methylcholesta-5,22-dien-3β,7β-diol (11), 24-methylene-5-cholesten-3β,7α-diol (12), and 5β,6-epoxy-24-methylene-cholestan-3β-ol (16). Also shown to be present are the known monohydroxysterols (22E,24S)-24-methylcholesta-5,22-dien-3β-ol (1), (22Z)-24-norcholesta-5,22-dien-3β-ol, 24-methylene-5-

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10

Coles, Simon J., Christopher S. Frampton та Michael B. Hursthouse. "5α-Cholestane". Acta Crystallographica Section E Structure Reports Online 58, № 4 (2002): o445—o446. http://dx.doi.org/10.1107/s1600536802004786.

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11

Alarif, Walied M., Sultan S. Al-Lihaibi, Ahmed Abdel-Lateff, and Seif-Eldin N. Ayyad. "New Antifungal Cholestane and Aldehyde Derivatives from the Red Alga Laurencia papillosa." Natural Product Communications 6, no. 12 (2011): 1934578X1100601. http://dx.doi.org/10.1177/1934578x1100601208.

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The chloroform/methanol extract of the red alga, Laurencia papillosa, collected from the Red Sea in Saudi Arabia, was found to contain two cholestane derivatives: 3α, 6α-dihydroxy-5β-cholestan-12-one (1) and the known, 6β-hydroxycholest-4-en-3-one (2), which was isolated separately in a pure form for the first time. In addition to these compounds, a new aldehyde derivative, ( E)-2-{( E) tridec-2-en-2-yl} heptadec-2-enal (3), was isolated. The structures of all compounds were established based on extensive spectroscopic (1D and 2D NMR, UV, IR) and mass spectrometric studies. All compounds, exce

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12

Blackman, Burchelle, Natarajan Raju, Chandrasekhar Mushti та ін. "Isolation and Identification of a Urinary Biomarker for Lung Cancer: 27-Nor-5β-Cholestane-3α,7α,12α,24R,25S Pentol Glucuronide and Its Deuterated Analog". Molecules 29, № 12 (2024): 2781. http://dx.doi.org/10.3390/molecules29122781.

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An untargeted metabolomic study identified four potential lung cancer diagnostic biomarkers in human urine. One of the potential biomarkers was an unidentified feature possessing a m/z value of 561+. “561+” was isolated from human urine and tentatively identified as 27-nor-5β-cholestane-3α,7α,12α,24,25 pentol glucuronide with unknown C24,25 stereochemistry using 1H NMR and mass spectrometry. In a prior report, the C24,25 stereochemistry of the aglycone, 27-nor-5β-cholestane-3α,7α,12α,24,25 pentol, was found to be 24S,25R through GC analysis of the acetonide-TMS derivative. An authentic sample

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13

Fischer-Lodike, Christian, Mohammad Albinsaad та James S. Chickos. "Vaporization Enthalpies and Vapor Pressures of 5α-Androstane and 5α-Cholestane by Correlation Gas Chromatography". Liquids 4, № 3 (2024): 456–69. http://dx.doi.org/10.3390/liquids4030025.

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Vaporization enthalpies and vapor pressures of 5α-androstane and 5α-cholestane are reported using correlation gas chromatography (CGC). The results for 5α-cholestane are compared to both estimated and experimental values reported previously for 5α-cholestane. The results are generally in agreement with the literature within the reported uncertainties. A simple method for reducing the amount of curvature in logarithm plots of vapor pressures as a function of K/T when using n-alkanes as standards in CGC experiments is also reported. This may prove useful in evaluating vapor pressures of rigid hy

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14

Lidström-Olsson, B., and K. Wikvall. "The role of sterol carrier protein2 and other hepatic lipid-binding proteins in bile-acid biosynthesis." Biochemical Journal 238, no. 3 (1986): 879–84. http://dx.doi.org/10.1042/bj2380879.

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The ability of different lipid-binding proteins in liver cytosol to affect enzyme activities in bile-acid biosynthesis was studied in whole microsomes (microsomal fractions) and mitochondria and in purified enzyme systems. Sterol carrier protein2 stimulated the 7 alpha-hydroxylation of cholesterol and the 12 alpha-hydroxylation of 5 beta-cholestane-3 alpha, 7 alpha-diol in microsomes and the 26-hydroxylation of cholesterol in mitochondria 2-3-fold. It also stimulated the oxidation of 5-cholestene-3 beta, 7 alpha-diol into 7 alpha-hydroxy-4-cholesten-3-one in microsomes. The stimulatory effect

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15

Wang, Jian-Xin, and Tong-Shuang Li. "The Retro-Michael Reaction of 1,5-Dicarbonyl Compounds: Scope and Limitation." Collection of Czechoslovak Chemical Communications 64, no. 1 (1999): 107–13. http://dx.doi.org/10.1135/cccc19990107.

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Under catalysis of NaOH or KOH adsorbed on glass wool and by using steam distillation, (20R,S)-4,4,5,14-tetramethyl-18,19-dinor-13,17-seco-5β,8α,9β,10α,14β-cholestane-13,17-dione (1) and 3,14-dioxo-14,15-seco-5α-cholestan-15-al (4) gave good yield (>59%) of the corresponding tricyclic compounds (8a, 8b and 10a) via a retro-Michael reaction at 250 °C. While 5-oxo-4-nor-3,5-secocholestan-3-oic acid (6) and ethyl 5-oxo-4-nor-3,5-secocholestan-3-oate (7) afforded low yield (<15%) of the retro-Michael cleavage products (12a, 12b) at the same conditions. Thus, the retro-Michael reaction worked

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16

Uzzaman, Shams, Hena Khanam, Ashraf Mashrai, Yahia Nasser Mabkhot та Ahmad Husain. "6-Hydroxyimino-5α-cholestane". Acta Crystallographica Section E Structure Reports Online 68, № 10 (2012): o3037—o3038. http://dx.doi.org/10.1107/s1600536812040093.

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17

Parvez, M., R. Nicholson, D. Simion, and T. S. Sorensen. "Naphtho[2,3-b]cholestane." Acta Crystallographica Section C Crystal Structure Communications 52, no. 8 (1996): 2113–15. http://dx.doi.org/10.1107/s0108270196003599.

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18

Kicha, Alla A., Thi H. Dinh, Natalia V. Ivanchina, et al. "Three New Steroid Biglycosides, Plancisides A, B, and C, from the Starfish Acanthaster planci." Natural Product Communications 9, no. 9 (2014): 1934578X1400900. http://dx.doi.org/10.1177/1934578x1400900912.

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Three new steroid biglycosides, plancisides A-C (1-3), were isolated from the ethanolic extract of the starfish Acanthaster planci. The structures of 1-3 were determined by extensive NMR and ESI-MS techniques, as (24 S)-28- O-[β-D-galactofuranosyl-(1→5)-α-L-arabinofuranosyl]-24-methyl-5α-cholestane-3β,4β,6α,8,15β,16β,28-heptol (1), (24 S)-28- O-[α-L-fucopyranosyl-(1→2)-3- O-methyl-β-D-xylopyranosyl]–24-methyl-5α-cholestane-3β,4β,6α,8,15β,16β,28-heptol (2) and (24 S)-28- O-[2,4-di- O-methyl-β-D-xylopyranosyl-(1→2)-α-L-arabinofuranosyl]-24-methyl-5α-cholestane-3β,4β,6α,8,15β,16β,28-heptol 6- O-s

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19

Ivanchina, Natalia V., Timofey V. Malyarenko, Alla A. Kicha, Anatoly I. Kalinovsky, Pavel S. Dmitrenok, and Valentin A. Stonik. "A New Steroidal Glycoside Granulatoside C from the Starfish Choriaster granulatus, Unexpectedly Combining Structural Features of Polar Steroids from Several Different Marine Invertebrate Phyla." Natural Product Communications 12, no. 10 (2017): 1934578X1701201. http://dx.doi.org/10.1177/1934578x1701201015.

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A new unique steroidal glycoside, granulatoside C (1), was isolated from the ethanol extract of the starfish Choriaster granulatus. The structure of 1 was elucidated by extensive NMR and ESI-MS techniques as (20 R)-16,21- O-di-(P-D-fucopyranosyl)-24-methyl-cholesta-5,24(28)-diene-3p,7a,16a,21-tetraol (1). This glycoside is unusual one, because combines some characteristic structural peculiarities of steroids from several different phyla of marine invertebrates, it has a range of structural features that not previously found in starfish polyhydroxysteroidal glycosides, such as Δ5-3β,7α,16α-trih

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20

Thomson, RJ, WR Jackson, D. Haarburger, EI Klabunovsky, and VA Pavlov. "The Stereochemistry of Organometallic Compounds. XXIX. Synthesis of Steroidal 1,4-Diphosphine, 1,3-Diphosphine and 1,6-Diphosphine and Their Evaluation as Ligands in Metal Catalyzed Asymmetric Synthesis." Australian Journal of Chemistry 40, no. 6 (1987): 1083. http://dx.doi.org/10.1071/ch9871083.

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The steroidal 1,4-diphosphines 3α- and 3β-diphenylphosphino-2a-(2'-diphenylphosphinoethyl)-5α-cholestanes and their 5H-benzo[b] phosphindole derivatives have been prepared and shown to be useful ligands in asymmetric hydrogenation reactions. Interestingly the 3α- and 3β-derivatives lead to opposing enantioselection preferences when used in these reactions. A steroidal 1,3-diphosphine, 3α-diphenylphosphino-2α-diphenylphosphinomethyl-5α-cholestane, has been prepared as a mixture containing some of the 3β-epimer. The 3α-1,3-diphosphine led to similar enantioselection in hydrogenation reactions as

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21

Kohout, Ladislav, and Miroslav Strnad. "Brassinosteroids with a cholestane side chain." Collection of Czechoslovak Chemical Communications 51, no. 2 (1986): 447–58. http://dx.doi.org/10.1135/cccc19860447.

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The synthesis of 2α,3α-dihydroxy-B-homo-7-oxa-cholestan-6-one (VI), 2β,3β-dihydroxy-B-homo-7-oxa-5α-cholestan-6-one (VIII) and 2α,3α-dihydroxy-B-homo-6-oxa-5α-cholestan-7-one (XI) is described. The activity of these brassinosteroids in the bean second internode bioassay is lower than the activity of 24-epibrassinolide (XXI).

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22

Mimaki, Yoshihiro, Tsukasa Aoki, Maki Jitsuno, Akihito Yokosuka, Ceyda Sibel Kiliç, and Maksut Coşkun. "Steroidal Saponins from the Rhizomes of Ruscus Hypophyllum." Natural Product Communications 3, no. 10 (2008): 1934578X0800301. http://dx.doi.org/10.1177/1934578x0800301018.

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Phytochemical screening of the rhizomes of Ruscus hypophyllum (Liliaceae) has resulted in the isolation of five spirostanol saponins (1-5) including a new saponin (4) and nine furostanol saponins (6–14) including three new saponins (9–11), together with a known cholestane glycoside (15) and a new cholestane glycoside (16). The structures of the new compounds were determined on the basis of extensive spectroscopic analysis, including 2D NMR data, and chemical evidence. The spirostanol saponins 1, 2, and 5 showed moderate cytotoxic activity against HL-60 human promyelocytic leukemia cells.

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23

Mimaki, Yoshihiro. "Structures and Biological Activities of Plant Glycosides: Cholestane Glycosides from Ornithogalum Saundersiae, O. Thyrsoides and Galtonia Candicans, and Their Cytotoxic and Antitumor Activities." Natural Product Communications 1, no. 3 (2006): 1934578X0600100. http://dx.doi.org/10.1177/1934578x0600100312.

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Systematic phytochemical screening of higher pants using a cytotoxicity-guided fractionation procedure resulted in the isolation from the bulbs of Ornithogalum saundersiae (Liliaceae) an acylated cholestane diglycoside, 17α-hydroxy-16β-[(O-(2-O-p-methoxybenzoyl-β-D-xylopyranosyl)-(1→3)-2-O-acetyl-α-L-arabinopyranosyl)oxy]cholest-5-en-22-one, tentatively named OSW-1. In vitro cytotoxic and in vivo antitumor screening of OSW-1 revealed that it is a possible candidate as a novel anticancer agent. Furthermore, more than 20 OSW-1-related compounds were isolated, not only from the bulbs of O. saunde

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24

Zhang, Gongcheng, Zhen Tan, Shujuan Wei, and Yulin Li. "SYNTHESIS 0F BI0MARKERS Ⅲ.SYNTHESIS OF 5α-CHOLESTANE AND 5β-CHOLESTANE." Chinese Journal of Applied Chemistry 6, no. 4 (1989): 50–53. http://dx.doi.org/10.3724/j.issn.1000-0518.1989.4.50.

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25

Zhang, Gongcheng, Zhen Tan, Shujuan Wei, and Yulin Li. "SYNTHESIS 0F BI0MARKERS Ⅲ.SYNTHESIS OF 5α-CHOLESTANE AND 5β-CHOLESTANE." Chinese Journal of Applied Chemistry 6, no. 4 (1989): 50–53. http://dx.doi.org/10.3724/j.issn.1000-0518.1989.4.5053.

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26

Fitzgerald, T. D., and F. X. Webster. "Identification and behavioral assays of the trail pheromone of the forest tent caterpillar, Malacosoma disstria Hübner (Lepidoptera: Lasiocampidae)." Canadian Journal of Zoology 71, no. 8 (1993): 1511–15. http://dx.doi.org/10.1139/z93-213.

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Behavioral assays show that the steroid 5β-cholestan-3-one, isolated from the abdomen of the larva of the forest tent caterpillar (Malacosoma disstria), constitutes the chemical basis of trail following in this insect. Caterpillars follow artificial trails prepared from solvent dilutions of the compound at rates as low as 10−11 g∙mm−11 of trail, though the true threshold sensitivity is likely to be one or two orders of magnitude lower than this. Fourth-instar caterpillars store an average of 58 ng of the pheromone. Field and laboratory studies indicate that the compound is fully competitive wi

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27

Hiraizumi, M., R. Komatsu, T. Shibata, Y. Ohta, and K. Sakurai. "Dissecting the structural basis for the intracellular delivery of OSW-1 by fluorescent probes." Organic & Biomolecular Chemistry 15, no. 17 (2017): 3568–70. http://dx.doi.org/10.1039/c7ob00486a.

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28

SHAFIULLAH and K. PATHAK R. "A Simple Method for the Transformation of Steroidal Epoxides to Olefins." Journal of Indian Chemical Society Vol. 64, Nov 1987 (1987): 668–69. https://doi.org/10.5281/zenodo.6222365.

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Steroid Research Laboratory, Department of Chemistry, Aligarh Muslim University, Aligarh-202 002 Manuscript <em>received 26 June 1986, revised </em>25 <em>September 1987, accepted 30 October 1987</em> 5,6α-Oxido-5α-cholestane (1) and its 3β-substituted analogues (2 - 4) on silver nitrate-neutral alumina surface were readily converted to cholest-5-ene (5) and its 3<em>β</em>-substituted analogues (6 - 8) in 90 - 95% yield.

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29

Parish, Edward J., Nida Aksara, Terrence L. Boos, and Edna S. Kaneshiro. "Remote Functionalization of the Cholestane Side-chain by Chromyl Acetates." Journal of Chemical Research 23, no. 12 (1999): 708–9. http://dx.doi.org/10.1177/174751989902301212.

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30

Saarem, K., та J. I. Pedersen. "Sex differences in the hydroxylation of cholecalciferol and of 5 β-cholestane-3 α, 7 α, 12 α-triol in rat liver". Biochemical Journal 247, № 1 (1987): 73–78. http://dx.doi.org/10.1042/bj2470073.

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The effect of sex hormones on hydroxylation of cholecalciferol (‘vitamin D3’) and of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol has been investigated in female- and male-rat livers. The mitochondrial cholecalciferol 25-hydroxylase and C27-steroid 27-hydroxylase activities were respectively 4.6- and 2.7-fold higher in female- than in male-rat livers. The microsomal 1 alpha-hydroxycholecalciferol 25-hydroxylase was 2.8-fold higher in male- than in female-rat liver. No significant difference was found in the microsomal 25-hydroxylation of 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha-triol

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31

A., H. SIDDIQUI, VENKATESHWER RAO K., and KESHAVA RAO R. "Synthesis of Steroidal Extranucleo Thiazolidones of Cholestane Series." Journal of Indian Chemical Society Vol. 65, Dec 1988 (1988): 879–80. https://doi.org/10.5281/zenodo.6106242.

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Department of Chemistry, Nizam College, Hyderabad-500 001 <em>Manuscript received 6 April 1988, accepted 1 September 1988</em> Synthesis of Steroidal Extranucleo Thiazolidones of Cholestane Series.  

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32

Kicha, Alla A., Dinh T. Ha, Timofey V. Malyarenko, et al. "Unusual Polyhydroxylated Steroids from the Starfish Anthenoides laevigatus, Collected off the Coastal Waters of Vietnam." Molecules 25, no. 6 (2020): 1440. http://dx.doi.org/10.3390/molecules25061440.

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Four new polyhydroxylated steroids 1–4 were isolated along with two previously known related steroids 5 and 6 from the methanolic extract of the starfish Anthenoides laevigatus collected off the coastal waters of Vietnam. Structures of new compounds were substantially elucidated by one-dimensional (1D) and two-dimensional (2D) NMR spectroscopy and HRESIMS techniques. Heptaol 1 and hexaol 2 contain the common 5α-cholestane skeleton, while hexaol 3 and heptaol 4 have the rare among starfish steroid compounds 5β-cholestane skeleton. Compounds 1, 5, and 6 do not show cytotoxic effects against norm

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33

Tagawa, Chie, Masafumi Okawa, Tsuyoshi Ikeda, Tatemi Yoshida, and Toshihiro Nohara. "Homo-cholestane glycosides from Solanum aethiopicum." Tetrahedron Letters 44, no. 26 (2003): 4839–41. http://dx.doi.org/10.1016/s0040-4039(03)01147-x.

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34

YOSHIMITSU, Hitoshi, Makiko NISHIDA, and Toshihiro NOHARA. "Cholestane Glycosides from Solanum abutiloides. III." CHEMICAL & PHARMACEUTICAL BULLETIN 48, no. 4 (2000): 556–58. http://dx.doi.org/10.1248/cpb.48.556.

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35

Agbaria, Rezik A., Ignacy Gryczynski, Henryk Malak, and Joseph R. Lakowicz. "Two-photon-induced fluorescence of cholestane." Biospectroscopy 2, no. 4 (1996): 219–24. http://dx.doi.org/10.1002/(sici)1520-6343(1996)2:4<219::aid-bspy2>3.0.co;2-1.

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Zhang, Zhong-Quan, Jian-Chao Chen, Lin Zhou, and Ming-Hua Qiu. "Two New Cholestane Bisdesmosides fromReineckia carnea." Helvetica Chimica Acta 90, no. 3 (2007): 616–22. http://dx.doi.org/10.1002/hlca.200790063.

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Al-lihaibi, Sultan S., Seif-Eldin N. Ayyad, Essam Al-wessaby та Walied M. Alarif. "3β, 7β-Dihydroxy-5α-cholestan-11-one: A new oxidation pattern of cholestane skeleton from Laurencia papillosa". Biochemical Systematics and Ecology 38, № 4 (2010): 861–63. http://dx.doi.org/10.1016/j.bse.2010.08.009.

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38

Shvets, Stepan, Irina Nedova, Pavel Kintia, Carla Bassarelo, Cosimo Pizza, and Sonia Piacente. "Steroidal Glycosides from the Roots of Solanum Melongena L." Chemistry Journal of Moldova 4, no. 2 (2009): 72–77. http://dx.doi.org/10.19261/cjm.2009.04(2).08.

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One new cholestane glycoside, six steroidal glycosides of spirostane series and one pregnane glycoside have been isolated from the roots of Solanum melongena L. for the first time. Their structures were determined by physico-chemical methods.

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Kručaitė, Augustė, and Alina Vilkaitė-Kitkovskė. "Specifinės nėščiųjų dermatozės." Lithuanian General Practitioner 28, no. 6 (2024): 468–75. http://dx.doi.org/10.37499/lbpg.1452.

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Tyrimo tikslas. Apibūdinti nėščiųjų specifines dermatozes ir aprašyti jų patofiziologiją, kliniką, diagnostiką ir gydymą, remiantis naujausiais tyrimais ir moksline literatūra. Metodai. Straipsnių paieška atlikta naudojant tarptautinę duomenų bazę „PubMed“. Į tyrimą įtraukti straipsniai, per pastaruosius 5–10 m. publikuoti anglų kalba. Rezultatai. Nėščiųjų specifinės dermatozės apima polimorfinį nėščiųjų išbėrimą, atopinį nėščiųjų dermatitą, gestacinį pemfigoidą ir intrahepatinę nėščiųjų cholestazę. Šios dermatozės nėščiosioms sukelia nerimą, diskomforto jausmą, pasireiškus išbėrimams ir inten

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Kuroda, Minpei, Yoshihiro Mimaki, Akihito Yokosuka, Yutaka Sashida, and John A. Beutler. "Cytotoxic Cholestane Glycosides from the Bulbs ofOrnithogalumsaundersiae." Journal of Natural Products 64, no. 1 (2001): 88–91. http://dx.doi.org/10.1021/np0003084.

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Mimaki, Yoshihiro, Minpei Kuroda, Aiko Kameyama, et al. "A New Cytotoxic Cholestane Bisdesmoside fromOrnithogalum saundersiaeBulbs." Bioscience, Biotechnology, and Biochemistry 60, no. 6 (1996): 1049–50. http://dx.doi.org/10.1271/bbb.60.1049.

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PARVEZ, M., R. NICHOLSON, D. SIMION, and T. S. SORENSEN. "ChemInform Abstract: Naphtho(2,3-b)cholestane (I)." ChemInform 27, no. 52 (2010): no. http://dx.doi.org/10.1002/chin.199652234.

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43

Chen, Qing-Wei, Xu Zhang, Ting Gong, et al. "Structure and bioactivity of cholestane glycosides from the bulbs of Ornithogalum saundersiae Baker." Phytochemistry 164 (June 6, 2019): 206–14. https://doi.org/10.1016/j.phytochem.2019.05.016.

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Chen, Qing-Wei, Zhang, Xu, Gong, Ting, Gao, Wan, Yuan, Shuai, Zhang, Pei-Cheng, Kong, Jian-Qiang (2019): Structure and bioactivity of cholestane glycosides from the bulbs of Ornithogalum saundersiae Baker. Phytochemistry 164: 206-214, DOI: 10.1016/j.phytochem.2019.05.016, URL: http://dx.doi.org/10.1016/j.phytochem.2019.05.016

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Iguchi, Tomoki, Naoki Takahashi, and Yoshihiro Mimaki. "A Total of Eight Novel Steroidal Glycosides Based on Spirostan, Furostan, Pseudofurostan, and Cholestane from the Leaves of Cestrum newellii." Molecules 25, no. 19 (2020): 4462. http://dx.doi.org/10.3390/molecules25194462.

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Previously, various steroidal glycosides were reported from plants of Cestrum species. However, phytochemical investigation has not been conducted on Cestrum newellii. A systematic phytochemical investigation of the leaves of C. newellii resulted in the isolation of eight novel steroidal glycosides (1–8), which were classified into three spirostanol glycosides (1–3), two furostanol glycosides (4 and 5), two pseudofurostanol glycosides (6 and 7), and one cholestane glycoside (8). In addition, three known cholestane glycosides (9–11) were isolated and identified. The structures of the new compou

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Šíša, Miroslav, Miloš Buděšínský та Ladislav Kohout. "Synthesis and Biological Activity of 7a-Homo- and 7a,7b-Dihomo-5α-cholestane Analogues of Brassinolide". Collection of Czechoslovak Chemical Communications 68, № 11 (2003): 2171–89. http://dx.doi.org/10.1135/cccc20032171.

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New analogues of castasterone, (20R)-2α,3α-dihydroxy-7a-homo-5α-cholestan-7-one (12) and (20R)-3α,4α-dihydroxy-7a-homo-5α-cholestan-7-one (14), and brassinolide, (20R)-2α,3α-dihydroxy-7a,7b-dihomo-7a-oxa-5α-cholestan-7-one (15), (20R)-3α,4α-dihydroxy-7a,7b-dihomo-7a-oxa-5α-cholestan-7-one (16) and (20R)-7-oxa-7a-homo-5α-cholestan-2α,3α-diol (24), were synthesized and their biological and spectral properties studied.

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Xu, Zhen-Peng, Yan Liu, Si-Yi Wang, et al. "Cholesaponins A-F, six new rare cholestane saponins including two unprecedented 14-methyl C28 cholestane saponins from Solanum xanthocarpum." Tetrahedron 109 (March 2022): 132674. http://dx.doi.org/10.1016/j.tet.2022.132674.

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Wang, He-Ping, Xiao-Jing Feng, Bao-Di Gou, Tian-Lan Zhang, Shan-Jin Xu, and Kui Wang. "Effects of LDL, Cholesterol, and Their Oxidized Forms on the Precipitation Kinetics of Calcium Phosphates." Clinical Chemistry 49, no. 12 (2003): 2027–36. http://dx.doi.org/10.1373/clinchem.2003.024513.

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Abstract Background: LDL, cholesterol, and their oxidized forms are known cardiovascular risk factors and are often found in atherosclerotic lesions of various stages. Little is known, however, about whether they are directly involved in the formation of calcium phosphate compounds. Methods: We used the pH-stat technique to follow the kinetics of calcium phosphate precipitation at pH 7.4, 37 °C, and ionic strength 0.150 mol/L, in the presence or absence of LDL, oxidized LDL, cholesterol, cholestane-3β,5α,6β-triol, and cholesteryl linoleate. The precipitates were characterized by x-ray diffract

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Gouda, Mohamed, Mai M. Khalaf, Saad Shaaban, and Hany M. Abd El-Lateef. "Fabrication of Chitosan Nanofibers Containing Some Steroidal Compounds as a Drug Delivery System." Polymers 14, no. 10 (2022): 2094. http://dx.doi.org/10.3390/polym14102094.

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A novel drug delivery system based on chitosan nanofibers containing some steroidal derivatives was developed using an electrospinning process. Oxazolines and aziridines from the cholestane series of steroidal epoxides were successfully synthesized and characterized by elemental analysis, Fourier transforms infrared spectroscopy (FTIR), proton nuclear magnetic resonance (1HNMR), and mass spectroscopy (MS). Steroidal-compound-loaded chitosan (ST-CH) nanofibers were fabricated using the electrospinning technique in the presence of polyvinylpyrrolidone (CH/PVP). The electrospun nanofibers were ch

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Abdel-Hameed, El-Sayed S., Hanan A. El-Nahas, and Eman A. El-Wakil. "Cytotoxic Cholestane and Pregnane Glycosides from Tribulus macropterus." Zeitschrift für Naturforschung C 62, no. 5-6 (2007): 319–25. http://dx.doi.org/10.1515/znc-2007-5-602.

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The methanol extract of the whole parts of Tribulus macropterus Boiss. (family Zygophyllaceae) showed cytotoxic activity against a human tumour cell line (hepatocyte generation 2, HepG2) (IC50 = 2.9 μg/ml). The n-butanolic fraction obtained from successive fractionation of the methanolic extract exhibited activity against HepG2 (IC50 = 2.6 μg/ml). Therefore, this fraction was subjected to separation using different chromatographic techniques. Five compounds, 1-5, were isolated and identified as: (22S,25S)-16β,22,26-trihydroxy-cholest-4- en-3-one-16-O-β-D-glucopyranosyl-(1→3)-β-D-xylopyranoside

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Kuroda, Minpei, Yoshihiro Mimaki, and Yutaka Sashida. "Cholestane rhamnosides from the bulbs of Ornithogalum saundersiae." Phytochemistry 52, no. 3 (1999): 445–52. http://dx.doi.org/10.1016/s0031-9422(99)00240-x.

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