Three new C21-steroidal glycosides from the roots of Cynanchum inamoenum
Title:
Three new C21-steroidal glycosides from the roots of Cynanchum inamoenum
Author:
Wang, LI-QIN Lu, YANG Zhao, YOU-XING Zhou, JUN Zheng, QI-TAI
Appeared in:
Journal of Asian natural products research
Paging:
Volume 9 (2007) nr. 8 pages 771-779
Year:
2007-12
Contents:
Three new C21-steroidal glycosides presenting an unusual 13,14:14,15-disecopregnane-type skeleton, named inamosides A-C (1-3), together with two known C21-steroidal glycosides, were isolated from the MeOH extract of the roots of Cynanchum inamoeum (Maxim.) Loes (Asclepiadaceae). The aglycone of compounds 1, 2, and 3 has a 2β-hydroxyl, which has not yet been reported in the literature. The structure and relative configuration of the aglycone of compounds 1, 2, and 3 were established by X-ray crystallographic analysis.