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%).
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Sharma et al. (1997) studied this question.
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