Gas-liquid chromatography of terpenes. Part XVI. The volatile oil of the leaves of Juniperus ashei Buchholz

Abstract

The major components of the leaf oil of the Ashe juniper were found to be d-camphor (42.1 %), d-bornyl acetate (22.5%), d-limonene (8.4%), tricyclene (4.8%), d-camphene (4.4%), d-borneol (2.9%), p-cymene (2.8%), d-α-myrcene (1.8%), d-α-pinene (1.7%), and d-camphene hydrate (1.5%). This appears to be the first time that the latter alcohol has been isolated from a natural source. Smaller amounts of linalool, carvone, elemol, and traces of trans-2-methyl-6-methylene-3,7-octadien-2-ol were also identified. Several alcohols having terminal methylene groups were isolated in trace amounts.The monoterpenes found in this oil are not typical for the genus Juniperus and this result offers a unique chemical approach to the study of introgression of the Ashe juniper with other juniper species.