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1.
南海短足软珊瑚Cladiella sp.中两个新孕甾醇苷的分离 总被引:2,自引:0,他引:2
从短足软珊瑚Cladiella sp.中,分离得到3个甾类化合物:孕甾-5,20-二烯-3β-醇-3-O-α-L-吡喃岩藻糖苷(1)、孕甾-5,20-二烯-3β-醇-3-O-β-D-吡喃木糖苷(2)和(22E,24R)-麦角甾-7,22-二烯-3β,5α,6β-三醇(3),其中1和2为新化合物.孕甾醇苷具有抗早孕和抑制肿瘤细胞生长活性. 相似文献
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远东疣柄牛肝菌的化学成分 总被引:3,自引:0,他引:3
从远东疣柄牛肝菌(Leccinum extremiorientale)子实体中提取分离得到13个 化合物,通过理化常数和波谱数据分析,它们的结构被鉴定为:麦角甾-7,22-二 烯-3β,5α,6β-三醇(1),麦角甾醇过氧化物(2),麦角甾醇(3),麦角甾 -4,6,8(14),22-四烯-3-酮(4),麦角甾-5,7-二烯-3β-醇(5),棕榈酸 (6),(2S,3S,4R,2’R)-2-(2’-羟基二十四碳酰胺)十八烷-1,3,4-三 醇(7),脑苷脂B(8),脑苷脂D(9),尿嘧啶(10),肌苷(11),腺苷(12 ),D-阿洛醇(13),利用2D NMR(~1H-~1H COSY,HMBC,HMQC)技术首次对化合 物8和9的氢谱和碳谱数据进行了全归属。在浓度为100 μg/mL时,化合物2,7和8 表现出选择性地抗蛇毒Crotalus adamenteus分泌的磷脂酶A_2活性,而对蜂毒 Apis mellifcra磷脂酶A_2却无活性。此外,远东疣柄牛肝菌提取物对粘虫拒食率 和小莱蛾死亡率分别为67%和55%。 相似文献
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在生物活性指导下,从一株来源于药用红树尖瓣海莲的内生真菌Penicillium sp.(J41221)中分离鉴定了6个化合物,包括4个四环三萜类化合物和2个甾醇类化合物,结构分别为:11-羰基-12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8,14-二烯-2α,3β-二醇(1),12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8-单烯-3β,11β-二醇(2),12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8,14-二烯-3β,11β-二醇(3),12α-乙酰氧基-4,4-二甲基-24-甲烯基-5α-胆甾-8,14-二烯-2α,3β,11β-三醇(4),啤酒甾醇(5)和(3β,5α,6β,22E)-6-甲氧基麦角甾-7,22-二烯-3,5-二醇(6).其中化合物1为首次从生物中获得,且1和2的波谱数据迄今未见任何报道.抗菌活性结果表明,化合物2和4对金黄色葡萄球菌、大肠杆菌和四联球菌均显示一定的抑制活性,最小抑菌浓度(MIC)分别为5和4.86μmol/L. 相似文献
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豆荚软珊瑚Lobophytum sp. 的次生代谢产物研究 总被引:4,自引:0,他引:4
从海南岛三亚海域采集的软珊瑚Labophytumsp.中分离得五个甾醇苷(1)~(5)。通过波谱分析,确定它们的化学结构依次为3'-O-乙酰基-4-O-[β-D-吡喃木糖苷]-孕甾-20-烯-3β,4α-二醇(1),4-O-[β-D-吡喃木糖苷]-孕甾-20-烯-3β,4α-二醇(2),4'-O-乙酰基-4-O-[β-D-吡喃木糖苷]-孕甾-20-烯-3β,4α-二醇(3),4'-O-乙酰基-4-O-[β-D-吡喃阿拉伯糖苷]-孕甾-20-烯-3β,4α-二醇(4)和4-O-[β-D-吡喃阿拉伯糖苷]-孕甾-20-烯-3β,4α-二醇(5),其中1为新化合物。体外细胞毒性实验表明:化合物(1),(2)和(5)对SKMG-4,Hep-G2和CNE2三种人体癌细胞具有抑制作用。 相似文献
6.
为了合理利用甾体皂甙元资源, 系统地考察了16R-溴代孕甾-3S,20S-二醇二乙酸酯在不同反应条件下与碱的反应. 给出了选择性地分别转化16R-溴代孕甾-3S,20S-二醇二乙酸酯成为孕甾-16-烯-3S,20S-二醇二乙酸酯、16R-溴代孕 甾-3S,20S-二醇、孕甾-3S,16S,20S-三醇、孕甾-14,16-二烯-3S-醇乙酸酯和雄甾-16-烯-3S-醇等化合物的可控性反应结果. 这些条件可控性反应结果不仅为甾体药物和生物活性天然甾体化合物合成提供了新的合成中间体, 也为它们新合成策略和途径的设计提供了机遇. 相似文献
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为研究滇产玉米须中的化学成分,采用硅胶柱层析和Sephadex LH-20柱层析进行化合物分离和纯化,采用EI-MS、HR-ESI-MS、1D-和2D-NMR以及化学方法对化合物结构进行鉴定。从滇产玉米须中分离得到了4个化合物,分别鉴定为:(2S,3S,4R)-2-[(2’R)-2’-hydroxydocosanoylamino]-1,3,4-octadecanetriol(1),ent-rosa-ne-5β,15,16-triol(2),麦角甾-7,22-二烯-3β,5α,6β-三醇(3),豆甾-5-烯-3β,7α-二醇(4)。化合物1和2为首次从玉米须中分离得到,并采用化学方法对化合物1进行结构确证,采用2D-NMR对这化合物2和3的碳氢数据进行准确归属。 相似文献
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L. K. Shubina T. V. Moskovkina V. A. Stonik G. B. Elyakov 《Chemistry of Natural Compounds》1981,17(5):418-422
The total sterols have been isolated fromHalocynthia aurantium by column chromatography on silica gel. The following steroid alcohols have been identified in it with the aid of GLC, GLC-MS, and1H NMR: 5α-cholestan-3β-ol, 24ξ-methylcholestan-3β-ol, 24ξ-ethylcholestan-3β-ol, 4ξ-methyl-24ξ-ethyl-5α-cholestan-3β-ol, cholest-5-en-3β-ol, 24ξ-methylcholest-5-en-3β-ol, 24ξ-ethylcholes-5-en-3β-ol, 5α-cholest-22-en-3β-ol, 24-nor-5α-cholest-22-en-3β-ol, cholesta-5,22-dien-3β-ol, 24ξ-methylcholesta-5,22-dien-3β-ol, 24-norcholesta-5,22-dien-3β-ol, 24-ethylcholesta-5,24(28)-dien-3β-ol, and 24-methylcholesta-5,24(28)-dien-3β-ol. 相似文献
12.
A new oxylipin, (8E,12Z)-10,11-dihydroxyoctadeca-8,12-dienoic acid (1), a new steroid, 3β,4α-dihydroxy-26-methoxyergosta-7,24(28)-dien-6-one (2), and four known steroids, episterol (3), (22E,24R)-ergosta-7,22-dien-3β,5α,6α-triol (4), (22E,24R)-ergosta-5,22-dien-3β-ol (5), and (22E,24R)-ergosta-4,6,8(14),22-tetraen-3-one (6), were isolated from the cultures of Aspergillus flavus, an endophytic fungus isolated from the marine red alga Corallina officinalis. Their structures and relative stereochemistry were elucidated by 1D, 2D NMR and mass spectroscopic techniques. 1 and 2 exhibited low activity to inhibit acetylcholinesterase and no activity against plant pathogenic fungi Colletotrichum lagenarium and Fusarium oxysporum. 相似文献
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Double bond isomerization of stigmasterol ((24S)-24-ethylcholesta-5,22-dien-3β-ol) with N-lithioethy-lenediamine produced stigmasta-5,17(20)-dien-3β-ol, stigmasta-5,20(22)-dien-3β-ol, stigmasta-5,23-dien-3β-ol and stigmasta-5,24-dien-3β-ol. Some starting material was also present in the isomerization mixture along with a small amount of stigmast-5-en-3β-ol. Similar treatment of 3α,5-cyclo-6β-methoxystigmast-22-en (stigmasterol i-methyl ether) followed by ozonization and removal of the ring A-protecting group yielded predominantly 3β-hydroxy-androst-5-en-17-one and 3β-hydroxypregn-5-en-20-one. The isomerization products of fucosterol (24-ethylcholesta- 5, 24(28)E-dien-3β-ol) and 23,24-bisnorchola-5,20-dien-3β-ol are also reported. 相似文献
14.
The methanolic extract of fruit bodies of cultivated Ganoderma lucidum was separated by silica gel column chromatography and preparative thin-layer chromatography to give ten compounds. On the basis of spectral analysis, chemical procedures and gas chromatography, d-mannitol (1), ergosta-7, 22-dien-3β-yl palmitate (2), ergosterol (3), ergosta-7, 22-dien-3β-ol (4), 5α-lanosta-7,9(11),24-trien-3β,26-diol (5), ergosterol peroxide (6), 24,25,26-trihydroxy-5α-lanosta-7,9(11)-dien-3-one (7), 5α-lanosta-7,9(11)-dien-3β,24,25,26-tetraol (8) and 8,9-epoxyergosta-5,22-dien-3β,15-diol (9) were identified. Among these compounds, 8,9-epoxyergosta-5,22-dien-3β,15-diol was first separated from Ganoderma lucidum. 相似文献
15.
From the black coral Antipathies dichotoma, a sphingolipid (2S*,3S*,4E,8E)-2N-[tetradecanoyl]-4(E),8(E)-icosadiene-1,3-diol (1) and a steroid (22E)-methylcholesta-5,22-diene-1α,3β,7α-triol (2) were isolated. Other known compounds, 3β,7α-dihydroxy-cholest-5-ene (3), (22E,24S),5α,8α-epidioxy-24-methylcholesta-6,22-dien-3β-ol (4) and (22E,24S),5α,8α-epidioxy-24-methylcholesta-6,9(11),22-trien-3β-ol (5). The structures were established on the basis of NMR spectroscopic analysis and comparison with literature. The antibacterial activity of five compounds was evaluated. 相似文献
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Yuehai ShenJianxun Wen 《Journal of fluorine chemistry》2002,113(1):13-15
A new and efficient route has been developed to synthesize 17β-(1-methyl-3-perfluoroalkyl)propyl-3β-androsterol (1) in nine steps from hyodeoxycholic acid via selective addition of 1-perfluoroalkyl iodide to 24-norchola-5,22-dien-3β-ol. From (1), the first series of steroidal liquid crystalline aliphatic esters (smectic A) with fluorocarbon side chains has been prepared. 相似文献
18.
Abdul Qadir Nausheen Khan Muhammad Arif Shehla Nasar Mir Najib Ullah Sauban Ahmed Khan Asad Ali Mohd Imran 《印度化学会志》2022,99(2):100354
Simmondsia chinensis L. commonly called as Jojoba and belongs to family Simmondsiaceae. It has shown positive pharmacological activities of these compounds which include antidiabetic, antirheumatic, anthelminthic, antipsoriatic, antioxidant, antiepileptic, antigonorrheal, analgesic, anti-inflammatory, and pesticidal activity of jojoba. The multifaceted action of numerous bioactives existing in the seed extract with therapeutic activity have attracted great research interest by pharmaceutical industries. n-hexane extract of Simmondsia chinensis L. (SC) Seeds was analysed by gas chromatography-mass spectroscopy for identification and characterization of phytobioconstituents and its therapeutic claim by traditional system. The major compounds discovered in SC seeds extract are cis-9-octadecen-1-ol (24.85%), 9-octadecen-1-ol, (Z)- (18.24%), Stigmast-5-en-3-ol (14.10%), Ergost-5-en-3-ol, (3-β)-ol (5.26%), (Z)-14-tricosenyl formate (5.24%), Thiositosteroldisulfide (3.64%), Silane, Dimethyl (dimethylpentyloxysilyloxy) tetradecyloxy- (3.41%), Ergost-5-ene, 3-methoxy-, (3β,24R)- (2.55%), Ergosta-5,22-dien-3-ol (2.22%), 1,19-eicosadiene (2.17%), Pentacosane (2.02%), Stigmasta-5,22-dien-3-ol (1.64%), 1,19-eicosadiene (1.57%), 9-octadecen-1-ol, (Z)- (1.46%), 9,19-cyclo-9β-lanostan-3β-ol, 24-methylene- (1.14%), (9Z)-9-octadecenyl palmitate (1.50%), Hexadecanoic acid, 9-octadecenyl ester, (Z) (1.37%), 9Z)-9-octadecenyl (9Z)-9-hexadecenoate (1.01%). The hexane extract of Simmondsia chinensis seeds comprises various polar and nonpolar phytobioconstituents. These compounds were established qualitatively via GC-MS evaluation. GC-MS reports will be promising in pharmaceutical sector in identification of variety of Phytobioconstituents in distinct plant extracts, polyherbal extract and the standardization of particular plant materials. 相似文献
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S. G. Batrakov V. B. Muratov O. G. Sakandelidze O. S. Reshetova B. V. Rozynov 《Chemistry of Natural Compounds》1984,20(4):444-450
A chloroform-methanol extract of the musculocutaneous sac of the Far-Eastern holothurianC. japonica has yielded a fraction of sterol sulfates (13% of the weight of the extract, 0.8% of the weight of the dry biomass), the main components of which were derivatives of cholest-5-en-3β-ol, 24-methylene-, 24-ethyl-, and 24-ethylidenecholest-5-en-3β-ols, 5α-cholestan-3β-ol, and 24-methyl- and 24-methylene-5α-cholesten-3β-ol; among the minor components were found the sulfates of 24-ethyl-5α-cholestan-3β-ol of cholesta-5,22-dien-3β-ol, of a Δ5-C30 sterol, and also of dienic and trienic C26 sterols. 相似文献
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Two new epoxy steroids, 5α,8α-epidioxy-22β,23β-epoxyergosta-6-en-3β-ol (1) and 5α,8α-epidioxy-22α,23α-epoxyergosta-6-en-3β-ol (2), and ten known steroids including (24R)-5α,8α-epidioxyergosta-6-en-3β-ol (3), (22E,24R)-5α,8α-epidioxyergosta-6,22-dien-3β-ol (4), (22E,24R)-5α,8α-epidioxyergosta-6,9(11),22-trien-3β-ol (5), β-sitosterol (6), sitost-5-en-3β-ol acetate (7), 7α-hydroxysitosterol (8), schleicheol 2 (9), (24R)-24-ethyl-5α-cholestane-3β,5α,6β-triol (10), 7α-hydroxystigmasterol (11), and stigmasterol (12) were isolated from Helianthus tuberosus grown in Laizhou salinized land of coastal zone of Bohai Sea, China. The structures of these compounds were unambiguously established by 1D, 2D NMR and mass spectroscopic techniques. The new compounds 1 and 2 exhibited weak antibacterial activity and no antifungal activity. 相似文献