abstract the hydrodistillated essential oil from fruits of guarea macrophylla vahl ssp. tuberculata (meliaceae) was analyzed by capillary gc and gc/ms. twenty-four sesquiterpenes were identified, representing 92.9% of volatiles, among which 78.2% were hydrocarbons and 14.7% were oxygenated components. the major components were found to be -copaene (10.3%), viridiflorene (14.6%) and cadina-1,4-diene (17.5%).