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Chemistry of Natural Compounds

, Volume 26, Issue 3, pp 304–307 | Cite as

Withasteroids of Physalis. IX. Physangulide — The first natural 22S-withasteroid

  • O. E. Vasina
  • N. D. Abdullaev
  • N. K. Abubakirov
Article

Abstract

A new withasteroid — physangulide — has been isolated from the leaves ofPhysalis angulata L. It has been shown that physangulide is the first natural 22S-withanolide. Its structure has been determined as 3β,4β,20,24,25-pentahydroxy-1-oxo-5β,6β-epoxy-20R,22S,24S,25R-withanolide. Its1H and13C NMR spectra, confirming this interpretation, are given.

Keywords

Lactone Chiral Center Keto Group Cotton Effect Amorphous Yellow Powder 

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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • O. E. Vasina
  • N. D. Abdullaev
  • N. K. Abubakirov

There are no affiliations available

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