通过核磁共振光谱法对韦氏韶子的一种乙酰化皂苷进行结构解析。

Structure elucidation of an acetylated saponin of Blighia welwitschii by NMR spectroscopy.

作者信息

Penders A, Delaude C

机构信息

Centre de Recherche Phytochimique-B6, Université de Liège, Belgium.

出版信息

Carbohydr Res. 1994 Oct 3;263(1):79-88. doi: 10.1016/0008-6215(94)00160-x.

DOI:10.1016/0008-6215(94)00160-x

PMID:7982232

Abstract

A new glycosylated triterpene has been isolated from the fruit of Blighia welwitschii. The structural analysis of its peracetylated derivative (1) was performed by 2D homonuclear and heteronuclear NMR spectroscopy. The saponin was shown to contain hederagenin and five sugar residues forming two glycosyl chains. The complete structure of the saponin was established to be 3-O-[beta-D-Glc p-(1-->3)-alpha-L-Rha p-(1-->2)-alpha- L-Ara p]-28-O-[beta-D-Glc p-(1-->6)-beta-D-Glc p]hederagenin.

摘要

从韦氏韶子果实中分离出一种新的糖基化三萜。通过二维同核和异核核磁共振光谱对其全乙酰化衍生物（1）进行了结构分析。该皂苷显示含有常春藤皂苷元和五个糖残基，形成两条糖基链。该皂苷的完整结构确定为3-O-[β-D-葡萄糖p-(1→3)-α-L-鼠李糖p-(1→2)-α-L-阿拉伯糖p]-28-O-[β-D-葡萄糖p-(1→）6)-β-D-葡萄糖p]常春藤皂苷元。