abstract the essential oil isolated by water and steam distillation from aerial parts of chaerophyllum macrospermum (spreng.) fisch et c. a. mey. was analyzed by capillary gc and gc/ms. among the 27 compounds identified, the major components were (e)--ocimene (55.9%), terpinolene (9.8%), -pinene (7.5%), -phellandrene (4.3%) and -pinene (4.2%).