C21 Steroidal Glycosides from Cynanchum wilfordii.

Eight new C21 steroidal glycosides, named wilfosides A-H ( 1- 8, resp.), along with one known compound wilfoside KIN ( 9), were isolated from the roots of Cynanchum wilfordii. The structures of the new glycosides were determined on the basis of spectroscopic analysis, including 1D- and 2D-NMR, and ESI-MS techniques, as well as by comparison of the spectral data with those of related compounds. [ABSTRACT FROM AUTHOR]