Abstract The essential oils obtained by steam distillation of the leaves, stem bark, stem wood, root bark, root wood and fruits of Siparuna guianensis were analyzed using a combination of GC/MS, retention indices and 13C-NMR spectroscopy. Epi-Î±-cadinol was the major component (11.9â39.9%) in almost all oils, except for the fruit and stem bark oils that contained 2-undecanone (52.7%) and terpinolene (33.3%) as main constituents, respectively.