Essential oils of Curcuma longa L. from Bhutan

The essential oils of Curcuma tonga 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 ot-turmerone (30-32%), ar-turmerone (17-26%) and beta-turmerone (15-18%). The leaf oil contained about 60 compounds and the main constituents were alpha-phellandrene (18.2%), 1,8-cineole 04.6%) and p-cymene (13.3%)