Glycosides of 14,15-Seco and 13,14:14,15-Disecopregnanes from the Roots of Cynanchum sublanceolatum

Abstract

Thirty-two new 13,14-seco and 13,14:14,15-disecopregnane glycosides were obtained from the roots of Cynanchum sublanceolatum (Asclepiadaceae). These glycosides were confirmed to be possessing five known compounds, cynajapogenin A, glaucogenin-A, 13-hydroxycynajapogenin A, 2α-hydroxyanhydrohirundigenin, atratogenin A and one new pregnane, 13-epi-cynajapogenin A, as their aglycones, using both spectroscopic and chemical methods.