The major components of the essential oils from Copaifera species are summarized in Table 1. In general, copaiba oils derived from Copaifera oleoresins are rich in sesquiterpene hydrocarbons and often dominated by β-caryophyllene . Some copaiba oils, however, also show significant concentrations of diterpene acids, which are generally analyzed as their methyl esters . A perusal of internet sources of copaiba oil suggests that the most important commercial sources of copaiba oil are C. langsdorffii, C. officinalis, and C. reticulata, and the most prized copaiba oils are rich in β-caryophyllene. The oleoresin essential oils from these three Copaifera species can have as much as 33% (C. langsdorffii), 87% (C. officinalis), and 68% (C. reticulata) β-caryophyllene (see Table 1).