 ISSN 0235-7216 ISSN 2424-4538 (online) |
2010 m. Nr. 1 Menthone- and estragole-rich essential oil of cultivated Ocimum basilicum L. from Northwest Iran
The hydrodistilled essential oil from aerial parts of cultivated Ocimum basilicum L. plants from Northwest Iran was analyzed by gas chromatography / mass spectrometry. Forty seven components were identified, comprising 97.9% of total oil. Monoterpenoids (77.8%) prevailed among the essential oil components, followed by the lesser share of sesquiterpenoids (12.8%). Oxygenated monoterpenes (75.3%) were the predominant components of oil with menthone (33.1%), estragol (21.5%), isoneomenthol (7.5%), menthol (6.1%) and pulegone (3.7%) as the main compounds. Limonene (1.5%) was the only highlighted monoterpene hydrocarbon. Sesquiterpene hydrocarbons (8.8%) were the second subclass of essential oil constituents with trans-caryophyllene (2.2%), germacrene D (1.4%), trans-β-farnesene (1.1%) and α-amorphene (1.1%) as their main ones. α-Cadinol (2.9%) – an oxygenated sesquiterpene – comprised notable amounts in the essential oil. An acetylated compound, namely menthyl acetate (5.6%), showed traceable amounts in the volatile oil profile. Methyl eugenol, a compound with highly appreciated amounts from most previous reports, comprised only one percent of oil. In total, the chemical and percentage composition of oil from cultivated O. basilicum L. from Northwest Iran was characterized as a new menthone / estragole type capable of providing these oxygenated monoterpenes for related food and pharmaceutical industries. Keywords: Ocimum basilicum L., Lamiaceae, essential oil constituents, GC/MS, menthone, estragole, isoneomenthol |
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