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HPLC chromatograms with fluorescence detection of 1.3 × 10-5 M hypericin eluting at an RT of 29.22 min (A), bile alone with an RT of 1.67 min (B) and 1.3 × 10-5 M hypericin in bile (C) with two above peaks (A, B) observed. FLU: Fluorescence units; HPLC: High performance liquid chromatography.
