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Journal of Chemistry
Volume 2013, Article ID 195057, 4 pages
Research Article

Chemical Composition of the Essential oil of Chromolaena odorata (L.) R. M. King & H. Rob. Roots from India

Department of Phytochemistry, Regional Medical Research Centre, Indian Council of Medical Research, Belgaum, Karnataka 590 010, India

Received 29 May 2013; Revised 19 September 2013; Accepted 20 September 2013

Academic Editor: Lian-Wen Qi

Copyright © 2013 Rajesh K. Joshi. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


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 consists mainly 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.