The hydrodistilled essential oil of the roots of Chromolaena odorata (L.) R. M. King & H. Rob. was analysed by gas chromatography
equipped with flame ionization detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC/MS). A total of
twenty-nine compounds have been identified, accounting 97.6% of the total oil. The main constituents were himachalol (24.2%),
7-isopropyl-1,4-dimethyl-2-azulenol (17.6%), androencecalinol (14.1%), and 2-methoxy-6-(1-methoxy-2-propenyl) naphthalene
(5.6%).The essential oil consistsmainly of phenyl derivatives (41.6%), followed by oxygenated sesquiterpenes ((26.6%), long-chain
hydrocarbons (18.9%), sesquiterpene hydrocarbons (6.8%), oxygenated monoterpenes (2.8%), and monoterpene hydrocarbons
(0.9%).This study revealed that the roots of C. odorata produced different chemotypes other than leaves oil. This is the first report
on the essential oil composition of the roots of C. odorata.
The hydrodistilled essential oil of the roots of Chromolaena odorata (L.) R. M. King & H. Rob. was analysed by gas chromatographyequipped with flame ionization detector (GC-FID) and gas chromatography coupled with mass spectrometry (GC/MS). A total oftwenty-nine compounds have been identified, accounting 97.6% of the total oil. The main constituents were himachalol (24.2%),7-isopropyl-1,4-dimethyl-2-azulenol (17.6%), androencecalinol (14.1%), and 2-methoxy-6-(1-methoxy-2-propenyl) naphthalene(5.6%).The essential oil consistsmainly of phenyl derivatives (41.6%), followed by oxygenated sesquiterpenes ((26.6%), long-chainhydrocarbons (18.9%), sesquiterpene hydrocarbons (6.8%), oxygenated monoterpenes (2.8%), and monoterpene hydrocarbons(0.9%).This study revealed that the roots of C. odorata produced different chemotypes other than leaves oil. This is the first reporton the essential oil composition of the roots of C. odorata.
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