1989 年 37 巻 1 号 p. 135-139
6"-Malonylginsenosides-Rb1, (6), -Rd (7) and 6"-malonylgypenoside V (8) were isolated from the fresh leaves of Gynostemma pentaphyllum selected from wild plants. It was found that the saponin content of dry leaves was markedly reduced because of decomposition of saponins, by intracellular glycosidases.