摘要
从中药川续断根部的乙醇提取物中分得一个新的三萜皂甙．经过测定，它为：３Ｏ［αＬ吡喃鼠李糖（１→３）］［βＤ吡喃葡萄糖（１→４）］βＤ吡喃葡萄糖（１→３）αＬ吡喃鼠李糖（１→２）βＬ吡喃阿拉伯糖常春藤甙元２８ＯβＤ吡喃葡萄糖（１→６）βＤ吡喃葡萄糖酯甙．本文采用一维ＳＥＭＤＹ，旋转坐标ＮＯＥ差谱和选择性远程ＤＥＰＴ新技术相结合测定该化合物的糖链结构．
A new 3,28 bidesmosidic triterpenoid saponin was isolated from the ethanolic extract of the root of Dipsocus asperoides C.Y.Cheng et T.M.A. and its structure established as 3 O α L rhammopyranosyl(1→3) β D glycopranosyl(1→4) β D glycopranosy(1→3) α L rhammopyranosyl (1→2) β L arabinopyranosyl hederagenin 28 O β D glycopranosyl (1→6) β D glycopranoside. The sites of glycosylation and the sequence of sugars in the glycoside can be determined unambiguously and total assignment of severely overlapping proton resonance of sugar residues were achieved by a combined use of the 1D SEMDY, NOE difference spectroscopy in rotating frame and selective long range DEPT techniques.
出处
《波谱学杂志》
CAS
CSCD
北大核心
1999年第1期45-52,共8页
Chinese Journal of Magnetic Resonance
关键词
中药
川续断
七糖皂甙
NMR亚谱
糖链结构
H NMR sepectrum of sugar residue, Dipsocus asperoides, 3,28 bidesmosidic triterpenoid saponin, Structural determination of Oligosaccharide Chains, ROE difference spectroscopy, Selective long range DEPT, 1D SEMDY
