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Two new dammarane-type triterpene saponins from red American ginseng
Jin-Ping Liu1, Dan Lu, Ping-Ya Li
1Institute of Frontier Medical Science, Jilin University, Changchun, China.
Abstract:
Two new dammarane-type triterpene saponins were isolated from the red American ginseng. The new saponins were named as pseudoginsenoside G(1) and pseudoginsenoside G(2). Their structures were elucidated by the combined analysis of NMR and mass spectrometry as 3-O-[β-d-glucopyranosyl-(1 → 2)-β-d-glucopyranosyl]-dammar-12-one-20S,24R-epoxy-3β,25-diol (pseudoginsenoside G(1)) (1) and 3-O-[β-d-glucopyranosyl-(1 → 2)-β-d-glucopyranosyl]-dammar-12-one-20S,24S-epoxy-3β,25-diol (pseudoginsenoside G(2)).
