A New Prosapogenin from Hovenia Saponin D by Mild Alkaline Degradation

Abstract

Alkaline cleavage of the glycosidic bonds of saponin D (2), obtained from the leaves of Hovenia dulcis, gave the genuine sapogenin, jujubogenin (1), saponin G (3) and a new compound (4) whose structure was characterized as 20-O-α-L-rhamnopyranosyljujubogenin on the basis of spectral analysis.