Saponins of Timo ( ?? ?? : Anemarrhenae Rhizoma). II. Structure of Timosaponin A-III.

Abstract

Timosaponin A-III, the crystalline steroid saponin isolated from a commercial crude drug Timo (Anemarrhenae Rhizoma), has been shown to be sarsasapogenin O-β-D-glucopyranosyl-(1→2)-β-D-galactopyranoside. The biose which forms the sugar moiety of timosaponin A-III was obtained as crystals from the partial hydrolyzate of the saponin and named timobiose.