chemical composition of the essential oils of peucedanum ruthenicum m. bieb. leaves, flowers and fruits

the essential oils of peucedanum ruthenicum m. bieb. (umbelliferae) leaves, flowers and fruits were prepared by hydrodistillation and analyzed by gc and gc-ms and the composition of the three essential oils were compared. thirty-three, thirty-seven and thirty-one compounds were identified in leaves, flowers and fruits essential oils representing 89.13%, 88.66% and 76.45% of total oils respectively. the major components were thymol (18.29%), ?-bisabulene (13.29%) for leaves oil, ?-myrcene (10.68 %) and germacrene-b (10.06%) for flowers oil and caryophyllene oxide (13.65%), 8, 9-dehydroisolongifolene (11.33%) and 1, 8-cineol (11.15%) for fruits oil. the amounts of monoterpens and sesquiterpenes were found nearly to be equal in oils of the three parts of plant.