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Polyoxypregnane Steroids from the Stems of Marsdenia tenacissima

✍ Scribed by Yao, Sheng; To, Kenneth Kin-Wah; Wang, Ya-Zhou; Yin, Chun; Tang, Chunping; Chai, Stella; Ke, Chang-Qiang; Lin, Ge; Ye, Yang

Book ID
126882644
Publisher
American Chemical Society
Year
2014
Tongue
English
Weight
356 KB
Volume
77
Category
Article
ISSN
0163-3864

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## Abstract Two new polyoxypregnane glycosides, marsdenosides L and M (**1** and **2**, resp.), along with five known polyoxypregnane glycosides, **3**–**7**, were isolated from the stem of __Marsdenia tenacissima__ (Roxb.) Wight et Arn. (Asclepiadaceae). The structures and relative configurations

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## Abstract Three new polyoxypregnane glycosides, marsdenosides I–K (**1**–**3**), were isolated from the stem of __Marsdenia tenacissima.__ The structures were elucidated on the basis of in‐depth spectroscopic analyses, and by means of chemical evidence. Marsdenoside I (**=** (3__Ξ²__,5__Ξ±__,11__Ξ±_