Part of the commercially available cedar oil is produced by steam distillation from wood shavings, it contains a wide variety of terpenes. The tree major components alpha-Cedrene, Thujopsene and Cedrol are more than 60% of the essential oil. The fruits also yield an essential oil which contains mostly D-Limonene.[
The oil derived from foliage and twigs has two main constituents Safrole and Limonene. One minor compound is the Podophyllotoxin, a non-alkaloid toxin lignan. The essential oil contains cedrol which has toxic and possibly carcinogenic properties.