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Two new 13,14:14,15-disecopregnane-type compounds from the roots of Cynanchum paniculatum
Dan Zhao1,2, Hai-Feng Wang1,2, Gang Chen1,2
1a School of Traditional Chinese Materia Medica , Shenyang Pharmaceutical University , Shenyang 110016 , China.
Abstract:
Two new 13,14:14,15-disecopregnane-type compounds glaucogenin F (1), glaucogenin F 3-O-β-D-oleandropyranoside (2), together with three known compounds cynapanoside A (3), cynatratoside A (4), and neocynapanogenin F 3-O-β-D-oleandropyranoside (5) were isolated from the 95% ethanol extract of the roots of Cynanchum paniculatum. The structures of new compounds were elucidated on the basis of extensive spectroscopic analyses, including 1D and 2D NMR, HRESIMS and NOESY.
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