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The molecular structure of curcumin isolated from the root of turmeric. Curcumin, a natural compound, is the most active agent of the polyphenolic curcuminoids derived from the root of turmeric (Curcuma longa). It is a tautomeric compound existing in organic solvents as its enolic form, and in water as a keto form. Turmeric, as a member of the ginger family, has been widely used as an herbal medicine, ingredient of cosmetics, and dietary supplement.
