ANTHRAQUINONES ISOLATED FROM ORINDA OFFICINALIS AND DAMNACANTHUS INDICUS

From chloroform extract of the root of Morinda officinalis, eightanthraquinones were isolated whose structures were deduced to be rubiadin (I),rubiadin- 1 - methyl ether (Ⅱ), 1 - hydroxyanthraquinone ( Ⅲ), 1 - hydroxy- 2 -methylanthraquinone (Ⅳ) , 1, 6 - dihydroxy- 2 , 4- dimethoxyanthraquinone (Ⅴ),1,6-dihydroxy- 2 -methoxyanthraquinone (Ⅳ),1 - hydroxy- 2- methoxyanthraquinone(Ⅶ) and physcion (Ⅷ). Except for compound I and compound Ⅱ, the other com-pounds, 1 - hydroxy- 2- hydroxymethylanthraquinone (IX), 1,3 - dihydroxy- 2 -methoxy -anthraquinone(X) , 1.4- dihydroxy- 2-methylanthraquinone (XI), 1 -methoxy - 2 - hydroxyanthraquinone (Ⅻ) and 1,4- dimethoxy - 2 - hydroxyanthra-quinone(ⅩⅢ), were isolated from chloroform extract of root of Damnacanthus indicus. Compound V, Ⅵ and ⅩⅢ are new compounds.