Triterpene and steroidal glycosides from the genus Melilotus and their genins.

Abstract

Three new triterpene oleanane glycosides, melilotosides A 1 , B 1 , and C 1 , and non-glycosylated soyasapogenol B were isolated from Melilotus officinalis (L.) Pall. (Fabaceae) roots. The structures of the glycosides were proved using chemical transformations and spectral data. Melilotoside A 1 is soyasapogenol B 3-O-β-Dxylopyranoside; melilotoside B 1 , soyasapogenol B 3-O-[β-D-galactopyranosyl-(1-2)-f-D-xylopyranoside]; melilotoside C 1 , soyasapogenol B 3-O-[α-L-rhamnopyranosyl-(1-2)-β-D-galactopyranosyl(1-2)-β-Dxylopyranoside].