来自山羊黄芪的新黄酮醇四糖苷。

New flavonol tetraglycosides from Astragalus caprinus.

作者信息

Semmar Nabil, Fenet Bernard, Gluchoff-Fiasson Katia, Comte Gilles, Jay Maurice

机构信息

Laboratoire de Phytochimie et Biologie Micromoleculaire, UFR de Biologie, Université Lyon 1, France.

出版信息

Chem Pharm Bull (Tokyo). 2002 Jul;50(7):981-4. doi: 10.1248/cpb.50.981.

DOI:10.1248/cpb.50.981

PMID:12130861

Abstract

A new flavonol tetraglycoside, together with four acylated derivatives, were isolated from the leaves of Astragalus caprinus. Their structures were elucidated by spectroscopic methods, mainly 2D NMR, as kaempferol-3-O-[[beta-D-xylopyranosyl(1-->3)-alpha-L-rhamnopyranosyl(1-->6)][alpha-L-rhamnopyranosyl(1-->2)]]-beta-D-galactopyranoside (1), its 3(Gal)-p-coumaric (2) and 3(Gal)-ferulic (3) esters, and its 4(Gal)-p-coumaric (4) and 4(Gal)-ferulic (5) esters.

摘要

从山羊黄芪叶中分离出一种新的黄酮醇四糖苷及其四种酰化衍生物。通过光谱方法，主要是二维核磁共振，确定它们的结构为山奈酚-3-O-[[β-D-吡喃木糖基(1→3)-α-L-吡喃鼠李糖基(1→6)][α-L-吡喃鼠李糖基(1→2)]]-β-D-吡喃半乳糖苷(1)、其3(Gal)-对香豆酸(2)和3(Gal)-阿魏酸(3)酯，以及其4(Gal)-对香豆酸(4)和4(Gal)-阿魏酸(5)酯。