Two new acetylated ginsenosides from the roots of Panax quinquefolium

Two new acetylated ginsenosides, 20(S)-protopanaxatriol-6-O-α-l-rhamnopyranosyl (1 → 2)-β-d-6′-O-acetylglucopyranoside (1) and 20(R)-protopanaxatriol-6-O-α-l-rhamnopyranosyl (1 → 2)-β-d-6′-O-acetylglucopyranoside (2), were isolated from the roots of Panax quinquefolium. The structures were elucidated on the basis of spectroscopic techniques and chemical means.