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Study of Essential Oils from Leaves of Asteraceae Family Species Ageratina dendroides and Gynoxys verrucosa

Abstract:

In the present research, essential oil from Ageratina dendroides (Spreng.) R.M. King & H. Rob. and Gynoxys verrucosa Wedd. collected of Ecuador were investigated. The isolation of the essential oil was carried out by hydrodistillation and the chemical composition is determined by gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detector (GC-FID). In the two species a total of sixty-two volatile compounds were identified, which represent between 98.61 - 99.17 % of the total chemical composition. The main components were germacrene D (29.92 ± 0.68 %), δ-cadinene (9.31 ± 0.11 %) and cis-cadina-1,4-diene (5.48 ± 0.04 %) in the essential oil of Ageratina dendroides, and α-zingiberene (45.57 ± 1.66 %), α-amorphene (11.12 ± 0.24 %), ρ-cymene (15.23 ± 0.10 %) and α-phellandrene (11.72 ± 0.15 %) in the oil of Gynoxys verrucosa. Yield and physical properties of essential oil are also reported. This is the first report on volatile compounds for this species.