Pyrrolizidine alkaloids and diterpenes from Villasenoria orcuttii

Abstract

The chemical study of Villasenoria orcuttii, the only species of the genus Villasenoria, afforded three acyclic diterpenes, two of them described for the first time. Two pyrrolizidine alkaloids, florosenine and floridanine, among other known compounds were also isolated. The absolute configuration of floridanine was determined by X-ray analysis using anomalous dispersion with Cu Ka radiation, and its 1H and 13C nuclear magnetic resonance (NMR) data were corrected. © 2013 Sociedade Brasileira de Química.