| constituents of the essential oil from aerial parts of chromolaena odorata from thailand. | the chemical composition of the essential oil from the aerial parts of chromolaena odorata, collected from phitsanulok, thailand was analyzed by means of gc-(fid) and gc-ms. twenty-two constituents were identified. the major components were pregeijerene (17.6%), germacrene d (11.1%), alpha-pinene (8.4%), beta-caryophyllene (7.3%), vestitenone (6.5%), beta-pinene (5.6%), delta-cadinene (4.9%), geijerene (3.1%), bulnesol (2.9%), and trans-ocimene (2.2%). | 2006 | 16835098 |