Abstract The oleoresins of 12 trees of Copaifera reticulata growing wild in the States of Pará and Amapá were examined by GC-FID and GC/MS. The majority oleoresins from Pará possessed high amounts of β-bisabolene (18.4â42.4%) and trans-α-bergamotene (11.8â29.6%). The oleoresins from Amapá were rich in β-caryophyllene (27.8â68.0%), β-selinene (0.2â20.6%) and β-bisabolene (3.7â17.8%). The results showed a high variation in the composition of the components of the oleoresins of C. reticulata.