TANNINS AND RELATED-COMPOUNDS .102. STRUCTURES OF TERCHEBULIN, AN ELLAGITANNIN HAVING A NOVEL TETRAPHENYLCARBOXYLIC ACID (TERCHEBULIC ACID) MOIETY, AND BIOGENETICALLY RELATED TANNINS FROM TERMINALIA-CHEBULA RETZ

被引:48
作者
LIN, TC
NONAKA, G
NISHIOKA, I
HO, FC
机构
[1] KYUSHU UNIV 62, FAC PHARMACEUT SCI, 3-1-1 MAIDASHI, HIGASHI KU, FUKUOKA 812, JAPAN
[2] TAIWAN FORESTRY RES INST, HENG CHUN, TAIWAN
关键词
Combretaceae; flavogallonic acid; mylobalan; oxidative phenol coupling; tannin; terchebulic acid; terchebulin; terflavin C; terflavin D; Terminalia chebula;
D O I
10.1248/cpb.38.3004
中图分类号
R914 [药物化学];
学科分类号
100701 ;
摘要
A chemical examination of mylobalans (the fruits of Terminalia chebula retz., Combretaceae) has led to the isolation and characterization of punicalagin (1), terflavin A (2) and a new ellagitannin named terchebulin (3), which possesses a novel tetraphenylcarboxylic acid (terchebulic acid) moiety. Furthermore, from the leaves of T. chebula, a series of biogenetically related hydrolyzable tannins, terflavins B (7), C (9) and D (10), punicalagin (1) and punicalin (8), have been isolated and structurally elucidated. The concomitant isolation of terflavins A (2) and B (7) provides biogenetic evidence that the terchebulic acid moiety is derived by an oxidative carbon-oxygen coupling of adjacent flavogallonic acid and gallic acid esters. © 1990, The Pharmaceutical Society of Japan. All rights reserved.
引用
收藏
页码:3004 / 3008
页数:5
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