Cyclopeptide Alkaloids from Paliurus ramossisimus
- 11 August 2000
- journal article
- research article
- Published by American Chemical Society (ACS) in Journal of Natural Products
- Vol. 63 (10) , 1338-1343
- https://doi.org/10.1021/np000136a
Abstract
Seven zizyphine A-type cyclopeptide alkaloids were isolated from the roots of Paliurus ramossisimus by the combination of centrifugal partition chromatography and conventional separation methods. The novel structures of paliurines A−F (1−6) were characterized and established on the basis of MS and elaborate NMR spectral analyses. Terminal dipeptide stereochemistry was confirmed by correlation with the synthetic dipeptides via comparison of their 13C NMR data.Keywords
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