Cycloartane glycosides from Trichosanthes tricuspidata

摘要

Three new cycloartane glycosides, named cyclotricuspidosides A, B and C, were isolated from the leaf and stem parts of Trichosanthes tricuspidata. The structure of the compounds have been determined as 28,31-di-O- beta -D- glucopyranosides of 1 alpha ,3 beta ,2 xi ,31-tetrahydroxy-24 xi ,-methyl-cycloartan-28- oic acid,1 alpha ,3 beta ,16 beta ,24 xi ,31-pentahydroxy-24 xi ,-methylcycloartan-28-oic acid and 1 alpha ,3 beta ,16 alpha 24 xi ,31-pentahydroxy-24 xi ,-methylcycloartan-28-oic. These structural elucidations were based on analyses of chemical and spectroscopic data.