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.