Xylopyrine-F, a new cyclopeptide alkaloid from Zizyphus xylopyra

Abstract

A new 14-membered ring cyclopeptide alkaloid xylopyrine-F, together with known alkaloids nummularine-P and sativanine-H, has been isolated from the root bark of Zizyphus xylopyra and their structures were established by chemical and spectral evidences.

Keywords:

• Zizyphus xylopyra
• Rhamnaceae
• cyclopeptide alkaloids
• nummualarine-P
• sativanine-H
• xylopyrine-F

Acknowledgements

The authors are thankful to Professor G. Rücker, Pharmazeutisches Institut der Universität Bonn, Germany for spectral analysis and authentic samples.