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(A) Fluorescence emission spectrum of warfarin (1.0 μM) in the presence of HSA (3.5 μM) and increasing concentrations (0.0, 0.5, 1.0, 2.0, 3.0, 5.0, and 10.0 μM) of DHF in PBS (pH 7.4). (B) DHF induced decrease in the fluorescence emission of warfarin (λex = 317 nm, λem = 379 nm).
