Journal of Research in Medical Sciences1735-1995542000120135473547ENDepartment of Pharmacognosy, Faculty of Pharmacy, Isfahan University of Medical Sciences and Health Services, Isfahan2000120120090416Background. Platycladus orientalis (L.) Franco, is a native plant growing wild in Iran. Methods. The essential oils of fresh fruits and terminal branch lets with adherent leaves of this plant were obtained by means of steam distillation method and analysed by GC-MS. Results and Discussion. Eighty components were identified in the investigated essential oils. The essential oil obtained from the branchlets of this plant contained 21 monoterpenoids, 28 sesquiterpenoids and 3 diterpenoids, while the essential oil of the fruits contianed 27 monoterpenoids, 12 sesquiterpenoids and 3 diterpenoids. The major constituent of both oils was ?-3-Carenehttp://jrms.mui.ac.ir/index.php/jrms/article/view/3547