Abstract
Cynanotophyllosides E-F, two new minor pregnane glycosides were isolated from the antidepressant active fraction of cultivated Cynanchum otophyllum, and their structures were determined as 12-O-vanilloyl-deacetylmetaplexigenin 3-O--D-glucopyranosyl-(1→4)--D-glucopyranosyl-(1→4)--D-cymaropyranosyl-(1→4)--D-oleandropyranosyl-(1→4)--D-digitoxopyranoside, and 12-O-nicotinoyl-deacetylmetaplexigenin 3-O--D-glucopyranosyl-(1→4)--D-glucopyranosyl-(1→4)--D-cymaropyranosyl-(1→4)--D-oleandropyranosyl-(1→4)--D-cymaropyranoside respectively, with the combination of spectroscopic and chemical analysis.
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