1,8-Dihydroxyanthraquinone derivatives from rhizomes of Rheum emodi Wall

摘要

Two 1,8-dihydroxyanthraquinones isolated from rhizomes of Rheum emodi Wall,have been characterized as 6-methyl-rhein 1 and 6-methyl-aloe-emodin 2 by spectral data and chemical studies.Rheum emodi Wall.(Fam:Polygonaceae,English Name Rhubarb)is a stout herb and distributed in the temperate and sub-tropical regions of Asian countries,viz.India(Kashmir,Assam,Sikkim),Nepal,Bhutan and China.