New dammarane-type triterpene saponins from Gynostemma pentaphyllum and their anti-hepatic fibrosis activities in vitro

Jiaogulan (Gynostemma pentaphyllum) tea as one functional food has been commercially available over the world. In this study, the chemical constituents and health properties of Gynostemma pentaphyllum (G. pentaphyllum) has been investigated. Three new dammarane-type triterpenes Gypenoside C, Gypenoside D, Gypenoside E as well as twenty-four known compounds were isolated from the total G. pentaphyllum saponins. The structural determination was...