Bangangxanthone A and B, two xanthones from the stem bark of Garcinia polyantha Oliv.

被引：33

作者：

Lannang, AM

Komguem, J

Ngninzeko, FN

Tangmouo, JG

Lontsi, D

Ajaz, A

Choudhary, MI

Ranjit, R

Devkota, KP

Sondengam, BL

机构：

[1] Univ Yaounde 1, Fac Sci, Dept Organ Chem, Yaounde, Cameroon

[2] Univ Karachi, Int Ctr Chem Sci, HEJ Res Inst Chem, Karachi 75270, Pakistan

来源：

PHYTOCHEMISTRY | 2005年 / 66卷 / 19期

关键词：

Garcinia polyantha; Guttiferae; bangangxanthone A; bangangxanthone B; prenylated xanthones; antioxidant;

D O I：

10.1016/j.phytochem.2005.06.016

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：

Two xanthones, bangangxanthone A (1) [1,5,8-trihydroxy-6'-methyl-6'-(4-methylpent-3-enyl)- pyrano[2',3':3,4]xanthone] and B (2) [1,4,8-trihydroxy-2-prenylxanthone], along with two known xanthones, 1,5-dihydroxyxanthone, 2-hydroxy-1,7-dimethoxyxanthone and the pentacyclic triterpenoids, friedelin, oleanolic acid and lupeol were isolated from the chloroform extract of the stem bark of Garcinia polyantha. The structures of these compounds were assigned by spectroscopic analysis. Compounds 1-4 showed antioxidant DPPH radical scavenging activities. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：2351 / 2355

页数：5

共 14 条

[1] XANTHONES FROM 3 GARCINIA SPECIES [J].