Essential oil constituents from Japanese and Indian Curcuma aromatica rhizomes.

The chemical compositions of the essential oils from rhizomes of Curcuma aromatica cultivated in Japan and India were analyzed by GC and GC/MS. These oils were extremely different. The major constituents in both oils from Japanese samples were curdione, germacrone, 1,8-cineole, (45,5S)-germacrone-4,5-epoxide, beta-elemene, and linalool, whereas those in the oil from Indian were beta-curcumene, ar-curcumene, xanthorrhizol, germacrone, camphor, and curzerenone.