思茅藤甙类成分研究  

STUDY ON GLYCOSIDAL CONSTITUENTS FROM EPIGYNUM AURITUM

作　　者：金岐端[1] 木全章[1] 

机构地区：[1]中国科学院昆明植物研究所植物化学开放研究实验室,昆明650204

出　　处：《药学学报》1991年第11期841-845,共5页Acta Pharmaceutica Sinica

基　　金：开放实验室基金

摘　　要：从思茅藤[Epigynun auritum(schneid.)Tsiang et P.T.Li]的茎皮中分离到胡萝卜甙(daucosterol)(Ⅰ)和一个新化合物(Ⅱ),命名为思茅藤甙(epigeoside)。经光谱分析和化学反应证明,Ⅱ的结构为儿茶素-3-O-α-L-鼠李吡喃糖(1→4)-β-D-葡萄吡喃糖(1→6)-β-D-葡萄吡喃糖甙[catechin-3-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside]。A known compound and a new glycoside, epigeoside, were isolated from the rhizomes of Epigynum auritum (Schneid.) Tsiang et P. T. Li (Apocynaceae). The structure of known compound was identified as daucosterol (β-sitosterol-β- D- glucopyranoside). The structure of epigeoside has been deduced on the basis of spectral analysis and chemical reactions as catechin - 3 - O - α - L - rhamnopyranosyl - ( 1→4 ) -β- D - glucopyranosyl - ( 1 →6 )-β - D - glucopyranoside.Partial hydrolysis of Ⅱ with 0.2 mol/L HC1 afforded compound Ⅱa and rhamnose. Acid hydrolysis of Ⅱa with 2 mol/L HC1 afforded an aglycone which was identified by comparison with catechin, and glucose.

关 键 词：思茅藤 儿茶素 夹竹桃科 

分 类 号：R282.710.5[医药卫生—中药学]