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Further polyoxypregnanes from Marsdenia tenacissima

✍ Scribed by Qiu Sheng-Xiang; Luo Si-Qi; Lin Long-Ze; Geoffrey A. Cordell

Book ID
103341608
Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
343 KB
Volume
41
Category
Article
ISSN
0031-9422

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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±_