abstract the chemical composition of the essential oils from leaves and fruits of piper divaricatum g. mey., collected in august 2005 and september 2006, was analyzed by gc/ms and gc-fid. twenty-six components, representing more than 94.0% of the chemical compositions of the oils, were identified. both oils showed higher concentrations of monoterpenoids, particularly the oils from leaves (74.2-81.1%). the oils showed some compositional similarities but the fruit oil could be easily distinguished from the leaf oil by the exclusive presence of -phellandrene (4.6-10.0%) and significant content of -caryophyllene (9.0-11.4%). the major constituents of the leaf oils were linalool (23.4-29.7%), -pinene (19.9-25.3%) and -pinene (9.0-18.8%), while the fruit oils contained -pinene (18.0-12.0%), -pinene (6.3-17.6%) and -caryophyllene (9.0-11.4%) as prevalent compounds.