MOLECULAR-STRUCTURES OF 4 TRITERPENOIDS - X-RAY CRYSTALLOGRAPHIC ANALYSIS OF METHYL 2-ALPHA,3-BETA,23-ALPHA-TRIACETOXY-19-ALPHA-HYDROXYURS-12-EN-28-BETA-OATE

被引：3

作者：

COX, PJ

DURHAM, DG

LIU, XJ

RICHARDS, RME

机构：

[1] School of Pharmacy, The Robert Gordon University, Schoolhill, Aberdeen

来源：

JOURNAL OF CRYSTALLOGRAPHIC AND SPECTROSCOPIC RESEARCH | 1993年 / 23卷 / 10期

关键词：

D O I：

10.1007/BF01247240

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A triterpenoid glycoside has been isolated from the roots of a herb used in traditional Chinese medicine. The molecular structure of this compound and its derivatives have been determined by spectroscopic studies and an X-ray analysis of the 2alpha,3beta,23alpha-triacetoxy-28beta-methyl ester of the aglycone. This aglycone belongs to the ursene structure series. The hydroxy group on ring E of these triterpenoids is alpha orientated and the side chains at C(2), C(3), C(4) and C(17) are alpha, beta, alpha and beta orientated, respectively. The C ring, which has a double bond at C(12)=C(13), adopts a sofa conformation.

引用

页码：779 / 783

页数：5

共 11 条

[1] ISOLATION AND STRUCTURE ELUCIDATION OF ABRUSLACTONE-A - A NEW OLEANENE-TYPE TRITERPENE FROM THE ROOTS AND VINES OF ABRUS-PRECATORIUS L [J].