abstract the chemical composition of essential oils obtained from fresh leaves and stem bark of southeastern brazilian native drimys brasiliensis miers were analyzed by gc and gc/ms and 37 compounds were identified. the oils from fresh leaves showed the presence of monoterpenes (53.9%) and sesquiterpenes (38.4%), with sabinene (9.5%), myrcene (10.5%), limonene (10.6%) and cyclocolorenone (16.0%) being the most abundant. the stem bark oil was characterized by predominance of sesquiterpenoids (87.6%) and the absence of monoterpenes, the main components being cyclocolorenone (28.3%) and spathuleneol (22.9%). a small amount of phenylpropanes (6.8-6.9%) was also detected in both oil samples.