Triterpene and steroidal glycosides of the genus Melilotus and their genins. VI. Melilotoside A2 and adzukisaponin V from the roots of M. tauricus

Two triterpene glycosides of the oleanane series, melilotoside A 2 and previously known adzukisaponin V, were isolated from the roots of Melilotus tauricus (L.) Pall. (Fabaceae). The structures of the glycosides were proved based on chemical transformations. Melilotoside A 2 had the structure soyasapogenol B 3- O -β-D-glucouronopyranoside; adzukisaponin V, soyasapogenol B 3- O -[α-L-rhamnopyranosyl-(1-2)-β-Dglucopyranosyl-(1-2)-β-D-glucuronopyranoside].