The essential oils obtained by water distillation from aerial parts of Achillea biebersteinii collected from two locations in Turkey were examined by GC and GC/MS. The oil of Ankara origin was rich in piperitone (49.90%). The oil of Erzurum origin contained 1,8-cineole (29.93%) and camphor (17.35%) as major constituents.
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Küsmenoglu et al. (1995) studied this question.
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