New pregnane glycosides from Cynanchum ascyrifolium.
Two new pregnane glycosides, cynascyrosides D and E, were isolated from the roots of Cynanchum ascyrifolium. The structures of these compounds were determined on the basis of spectroscopic and chemical evidence as cynajapogenin A 3-O-alpha-L-cymaropyranosyl-(1-->4)-beta-D-digitoxopyranosyl-(1-->4)-beta-L-cymaropyranoside and cynajapogenin A 3-O-beta-D-glucopyranosyl-(1-->4)-alpha-L-diginopyranosyl-(1-->4)-beta-L-cymaropyranosyl-(1-->4)-beta-D-digitoxopyranoside.
Yeo
Hosup
H
College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Korea.
Choi
Young Hae
YH
Kim
Jinwoong
J
D029062:Apocynaceae / Q000737:chemistry*; D011278:Pregnanes / Q000737:chemistry / Q000302:isolation & purification*
D011278:Pregnanes; C464729:cynascyroside D; C464730:cynascyroside E