A bianthraquinone and anthraquinone from Cassia javanica heart wood

Phytochemical study of Cassia javanica stem bark has resulted in the isolation of one new bianthraquinone, 4,4'-bis(1,5-dihydroxy-7-hydroxymethyl-2-methyl-3-methoxy) anthraquinone, along with known compounds anthraquinone, 1,3,5,8-tetrahydroxy-6-methoxy-2-methyl anthraquinone and 1,2-dihydro-1,3-dihydroxy-6,8-dimethoxy-2-methyl anthraquinone.