Kompozicija i sezonska varijabilnost etarskog ulja Phlomis fruticosa L.
Composition and seasonal variability of Phlomis fruticosa L. essential oils
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The essential oil from the leaves of Phlomis fruticosa L. (Lamiaceae) was prepared by hydrodistillation. Plants were collected every three months during the period January - October, 1997. Eighteen components contained in essential oil were identified by GC-MS analysis. The main components were α-pinene, 1,8-cineole and β-caryophyllene. The results indicate seasonal differences in oil composition, especially in concentrations of two dominant components, α-pinene and 1,8-cineole. .