Studies on the Constituents of Asclepiadaceae Plants. XXXII. : Aglycones from Cynanchum wilfordi HEMSLEY

Abstract

Structures of two new polyoxypregnane ester-type aglycones ; 12-O-cinnamoyl-20-O-ikemaoylsarcostin (VII) and 12-O-cinnamoyl-20-O-tigloylsarcostin (VIII), from the glycoside of C. wilfordi HEMSLEY, were elucidated by chemical and physicochemical analyses. Kidjoranin (IV), caudatin (V) and penupogenin (VI) were also obtained.