Cynotophyllosides K-L from the Roots of Cynanchum Otophyllum

Abstract

Two new C21 steroidal glycosides named as cynotophyllosides K-L, were isolated from the roots of Cynanchum otophyllum, together with three known steroids cynotophylloside H, sarcostin and deacetylmetaplexigenim. The structure of the new compounds were established by spectroscopic and chemical analyses, especially 2D NMR techniques.

New Immunomodulating Polyhydroxypregnane Glycosides from the Roots of Cynanchum otophyllum C.K.Schneid.

“…The known compounds were identified as deace- [21] sarcostin 3-O-β-D-cymaropyranosyl-(1!4)-α-L-digitoxopyranoside (9), [21] and 12β-O-acetyl-20-O-(2-methylbutanoyl)sarcostin (10). [22] Generally, all compounds could be further divided into two different groups depending on the aglycone.…”