The chemical composition of the essential oils obtained by hydrodistillation of air-dried flower, leaf and stem of Senecio trapezuntinus Boiss were analysed by GC-FID and GC-MS. Thirty-eight compounds were identified, constituting over 91.7%, 86.2% and 73.5% of the total oil composition of flower, leaf and stem of S. trapezuntinus, respectively. Sesquiterpene hydrocarbons were shown to be the main group of constituents of all three part of the plant. The main component of the flower, leaf and stem essential oils was (E)-β-farnesene (26.3%, 16.9%, and 31.2%, respectively).
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