Essential oil composition and antibacterial activity of two Ageratina species collected in Mérida-Venezuela.

Author(s): Rojas-Vera Janne

Essential oil from leaves of Ageratina jahnii (B.L.Rob.) R. M. King & H. Rob. and Ageratina pichinchensis (Kunth) R. M. King & H. Rob (Asteraceae) collected in Jan 2010 were analyzed by GC/MS. Oils extracted by hydrodistillation yielded 0.50% and 0.43% w/v, respectively. Fifteen and twenty five components were identified by comparison of their mass spectra with the Wiley GC-MS Library data and by their retention indices (RI). The major components identified in A. jahnii were β-myrcene (31.6%), α-pinene (23.1%), limonene (7.8%) and pentacosane (10.2%) while for A. pichinchensis 8,9-epoxythymyl isobutyrate (21.2%), germacrene-D (20.8%), thymyl isobutyrate (15.8%), eupatoriochromene (5.5%) and encecalol (4.9%) were observed as main compounds. This is the first report regarding the essential oil composition and antibacterial activity of the essential oil of A. jahnii.

Entrümpelungsdienst Wien Entrümpelungsfirma Wien Entrümpelungsunternehmen Wien

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