title: Bianthraquinones from Cassia siamea.
abstract: The isolation of two bianthraquinones, 1,1',3,8,8'-pentahydroxy-3',6-dimethyl[2,2'-bianthracene]-9,9',10,10'-tetrone and 7-chloro-1,1',6,8,8'-pentahydroxy-3,3'-dimethyl[2,2'-bianthracene]-9,9',10,10'-tetrone, from the root bark of Cassia siamea is reported. The structures were established by analysis of spectroscopic data and 7-chloro-1,1',6,8,8'-pentahydroxy-3,3'-dimethyl[2,2'-bianthracene]-9,9',10,10'-tetrone was determined on the direct comparison with synthetic compound.
authors.affiliation: Kobe Pharmaceutical University, Japan. j-koyama@kobepharma-u.ac.jp
authors.forename: J
authors.initials: J
authors.lastname: Koyama
authors.forename: I
authors.initials: I
authors.lastname: Morita
authors.forename: K
authors.initials: K
authors.lastname: Tagahara
authors.forename: M B
authors.initials: MB
authors.lastname: Aqil
mesh_terms: D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D002366:Cassia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal
chemical_list: D000880:Anthraquinones