Bianthraquinones from Cassia siamea.
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.
Koyama
J
J
Kobe Pharmaceutical University, Japan. j-koyama@kobepharma-u.ac.jp
Morita
I
I
Tagahara
K
K
Aqil
M B
MB
D000880:Anthraquinones / Q000737:chemistry / Q000302:isolation & purification*; D002366:Cassia / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal
D000880:Anthraquinones