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Two new dammarane-type triterpene sapogenins from Chinese red ginseng
Qian Zheng1, Zhuo Li1, Jinping Liu1
1a College of Pharmacy , Jilin University , 126 Xinmin Street, Chaoyang District, Changchun , Jilin CN 130021 , P.R. China.
Abstract:
Two new dammarane-type triterpene sapogenins were isolated from the Chinese red ginseng. The new sapogenins were named as 24,26-dihydroxy-panaxdiol (1) and 24-hydroxy-panaxdiol (2). Their structures were elucidated by the combined analysis of NMR and mass spectrometry as 20(S),25(R)-epoxydammarane-3β,12β,24β,26-tetraol (1) and 20(S),25-epoxydammarane-3β,12β,24α-triol (2). The complete signal assignments of the two compounds were carried out by 2D NMR spectral and NOE differential spectroscopy analysis.
