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Three New Polyoxypregnane Glycosides from Marsdenia tenacissima.

✍ Scribed by Jun Deng; Zhixin Liao; Daofeng Chen

Publisher: John Wiley and Sons
Year: 2006
Weight: 17 KB
Volume: 37
Category: Article
ISSN: 0931-7597
DOI: 10.1002/chin.200607190

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Three New Polyoxypregnane Glycosides fro

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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__β__,5__α__,11__α_

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Four new pregnane glycosides, tenacigenosides A -D (1 -4), along with six known pregnane aglycones and five known pregnane glycosides, were isolated from the stems of Marsdenia tenacissima (ROXB.) WIGHT et ARN. (Asclepiadaceae). The chemical structures of the new compounds were established by 1D-and