A new ocotillol-type triterpenoid saponin from red American ginseng
Jin-Ping Liu1, Fang Wang, Ping-Ya Li
1Institute of Frontier Medical Science, Jilin University, Changchun 130021, China.
Natural Product Research
|October 21, 2011
Abstract:
A new ocotillol-type triterpenoid saponin, named 20(R)-pseudoginsenoside F(11) (1), was isolated along with pseudoginsenoside F(11) (2) from red American ginseng. The structure of the new saponin was elucidated as 6-O-[α-L-rhamnopyranosyl-(1 → 2)-β-D-glucopyranosyl]-dammar-20R, 24R-epoxy-3β, 6α, 12β, 25-tetraol by a combination analysis of NMR and mass spectrometry. The complete signal assignments of the two compounds were carried out by means of 2-D NMR spectral analysis.
