Essential Oils ofCurcuma longaL. from Bhutan

Abstract
The essential oils of Curcuma longa L. (Zingiberaceae) were isolated from its rhizomes and leaves by hydrodistillation. The oils were analyzed by high resolution GC and GC/MS. The rhizome oils contained more than 40 constituents, of which the major ones were α-turmerone (30–32%), ar-turmerone (17–26%) and β-turmerone (15–18%). The leaf oil contained about 60 compounds and the main constituents were α-phellandrene (18.2%), 1,8-cineole (14.6%) and p-cymene (13.3%).