Chikusetsusaponin. VI. A New Saponin from the Rhizome of Panax pseudo-ginseng var. angustatus HARA

A novel saponin named chikusetsusaponin VI was isolated from the rhizome of Panax pseudo-ginseng var. angustatus HARA and its structure was determined as 20(S)-protopanaxadiol 3-O-β-D-glucopyranosyl(1→2)-[β-D-xylopyranosyl-(1→6)]-β-D-glucopyranosido-20-O-β-D-glucopyranosyl(1→6)-β-D-glucopyranoside.