- Bitetrahydroanthracenes from flowers of Cassia torosa Cav.
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A new bitetrahydroanthracene derivative, torosaol-III, was isolated from the flowers of Cassia torosa Cav. along with physcion, 5,7'-physcionanthrone-physcion, 5,7'-biphyscion, torosanin-9,10-quinone, 5,7-dihydroxychromone, naringenin, and chrysoeriol. The structure of torosaol-III was established as 3,3',4,4'-tetrahydro-3,3',8,8',9,9'-hexahydroxy-6,6'-dimethoxy-3,3'-di methyl-1(2H),1'(2H)-5,7'-bianthracenone on the basis of spectral and chemical evidence. Dimeric tetrahydroanthracenes exhibited cytotoxic activity against KB cells in the tissue culture.
- Kitanaka,Takido
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p. 2588 - 2590
(2007/10/02)
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