Four new dammarane-type triterpenes derivatives from hydrolyzate of total <i>Gynostemma pentaphyllum</i> saponins and their bioactivities

Abstract

Phytochemical investigation of hydrolysate of total G. pentaphyllum saponins led to the isolation of four novel triterpenes, Gypensapogenin U (1), Gypensapogenin V (2), Gypensapogenin W (3) and Gypensapogenin X (4). The structures of these compounds were identified by 1D, 2D-NMR and HR-ESI-MS evidences. Additionally, the protective activity of these new compounds against cardiomyocytes injury induced by H2O2 and their cytotoxic activity against t-HSC/Cl-6 cells were evaluated.