Withanolides of Datura metel

Abstract

The leaves of Datura metel yielded three new withanolides in addition to lycium substance B, previously reported from other Datura species. The structures of the withanolides, clarified by comprehensive spectral analysis, showed features of typical daturalactones as well as of the withanolides of D. metel. p-Hydroxy cinnamic acid amide of tyramine was also isolated. © 1992.