Unusual phenolic glycosides from Cotoneaster orbicularis

被引：38

作者：

El-Mousallamy, AMD

Hussein, SAM

Merfort, I

Nawwar, MAM ^{[1
]}

机构：

[1] Natl Res Ctr, Dept Phytochem, Div Pharmaceut Sci, Cairo, Egypt

[2] Zagazig Univ, Dept Chem, Zagazig, Egypt

[3] Univ Freiburg, Inst Pharmazeut Biol, D-79104 Freiburg, Germany

来源：

PHYTOCHEMISTRY | 2000年 / 53卷 / 06期

关键词：

Cotoneaster orbicularis; Rosaceae; whole plant; C-glycosylflavones; 6,8-di-C-cellobiosylapigenin; phenolic acid-O-glucoside; gentisic acid; 2-O-glucopyranoside; orbicularin; ESI-MS; NMR;

D O I：

10.1016/S0031-9422(99)00598-1

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The whole plant of Cotoneaster orbicularis contains the novel di-C-glycosylflavone 4",4"'-di-O-beta-glucopyranosyl-vicenin II, or 6.8-di-C-beta-Cellobiosylapigenin, as well as the hitherto unknown natural phenolic glucoside, gentisic acid 2-O-beta-glucopyranoside, or orbicularin. Further phenolics are protucatechuic. anisic, caffeic, p-coumaric acids, catechin, epicatechin. 2"-O-alpha-rhamnopyranosylvitexin, vitexin, rutin, isoquercetrin, hyperin and naringenin. All structures were determined by routine methods of analysis and confirmed mostly by H-1- and C-13-NMR. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：699 / 704

页数：6

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