Abstract
A new saponin, named ginsenoside-Ia, was isolated from leaves of Panax ginseng, together with nine known saponins, and its structure was elucidated as 3β,6α,12β,20(S)-tetrahydroxyldammar-24(25)-ene (20-O-β-D-glucopyranosyl)-3-O-β-D-glucopyranoside on the basis of chemical and 2D-NMR methods.