Abstract The hydrodistilled oil of the leaf of Chaerophyllum macropodum Boiss. was analyzed by GC and GC/MS. Eighteen constituents representing (99.3%) of the oil were identified of which (E)-Î²-ocimene (24.9%), myristicin (15.7%), terpinolene (14.5%), and Î±-fenchyl acetate (13.9%) were major components.