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  • Title: C21 steroidal glycosides from Cynanchum wallichii Wight.
    Author: Chen G, Xu N, Pei YH.
    Journal: J Asian Nat Prod Res; 2009; 11(2):177-82. PubMed ID: 19219732.
    Abstract:
    Three new C21 steroidal glycosides, characterized with rostratamine and qinyangshengenin as aglycone moiety and 2,6-dideoxy-pyranoses as component sugars, have been isolated from the roots of Cynanchum wallichii Wight. The structures of the three new C21 steroidal glycosides were elucidated as rostratamine-3-O-beta-D-oleandropyranosyl-(1 --> 4)-beta-d-cymaropyranosyl-(1 --> 4)-beta-D-cymaropyranoside, qinyangshengenin-3-O-beta-D-cymaropyranosyl-(1 --> 4)-beta-D-digitoxo-pyranoside, and qinyangshengenin-3-O-beta-D-oleandropyranosyl-(1 --> 4)-beta-D-cymaropyranosyl-(1 --> 4)-beta-D-digitoxopyranoside.
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