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Representative HPLC chromatography of standards of (A1) bisdemethoxycurcumin (0.5 µg/mL), (A2) demethoxycurcumin (0.5 µg/mL), (A3) curcumin (1 µg/mL) and ethanol extracts (2 µg/mL) of (B1) non-roasted, (B2) light-roasted, (B3) dark-roasted turmeric samples.
