Chemical composition of the foliar essential oil of Juniperus occidentalis var. occidentalis from southeastern Oregon

Abstract

The essential oil was obtained from the foliage of Juniperus occidentalis collected from Leslie Gulch, southeastern Oregon, by hydrodistillation. Gas chromatographic analysis revealed a total of 120 identified components with bornyl acetate (36.8%), p-cymene (9.9%), terpinen-4-ol (7.6%), and sabinene (6.2%) as major components. Enantioselective gas chromatography showed, for the first time, that (+)-?-pinene, (+)-camphene, (+)-sabinene, (+)-?-pinene, (+)-?-3-carene, (+)-limonene, (+)-cis-sabinene hydrate, (+)- camphor, (+)-terpinen-4-ol, (+)-borneol, and (+)-?-terpineol were the predominant enantiomers in J. occidentalis essential oil.