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Chemical Constituents of Essential Oil from Leaves of an Invasive Weed Ageratina adenophora in Central Nepal
This study aims to identify volatile chemical components in the essential oil of an invasive plant, Ageratina adenophora, from Central Nepal. Leaf samples of A. adenophora were collected, and the chemical composition of essential oil was analysed by gas chromatography (GC) and GC–mass spectrometry (GC/MS). A total of 27 components in the oil were identified. The major compounds were cadinol, bisabolol and bornyl acetate. The amount of valencene, elemol and 2(1H)-naphthalenone, 4a,5,6,7,8,8a-hexahydro-6-[1-(hydroxymethyl)ethenyl]-4,8a-dimethyl-, [4ar(4a.alpha.,6.alpha.,8a.beta.]- varied with samples collected from different elevations. Five compounds, viz. cloven, β-gurjuene, β-cubebene, verbenone and cis-β-farnesene were rarely reported previously from A. adenophora. Being an invasive and medicinal plant, A. adenophora is found in varied ecological conditions. Further studies on the variation in amount and composition, phytotoxicity and benefits of such compounds are recommended.
Keywords
Ageratina adenophora, Chemical Constituents, Essential Oil, Gas Chromatography, Mass Spectrometry.
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