Chemical studies on the heartwood of Cassia garrettiana Craib. I. Anthraquinones including cassialoin, a new anthrone C-glycoside.

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Abstract
The heartwood of Cassia garrettiana CRAIB. (Leguminosae), one of the Thai drugs being used as a mild cathartics in the folk medicine, afforded a new anthrone-C-glycoside named cassialoin, together with anthraquinones which were identified as chrysophanol, chrysophanol benzanthrone with the structure of 4-methyl-6, 8-dihydroxy-7H-benz [de]-anthracen-7-one, chrysophanol dianthrone and (-)-11-deoxyaloin, as well as various phenolic compounds. The structure of cassialoin was established as 10-hydroxy-10-C-D-glucosylchrysophanol-9-anthrone.

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