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Representative extracted ion chromatographs (multiple reaction monitoring) of a metabolites identified in bile (0–15 min) after intravenous administration of 0.96 mg/kg arctigenin in rats; b arctigenin and metabolites identified in plasma (2 min) after intravenous administration of 0.96 mg/kg arctigenin; and c arctigenin and metabolites identified in plasma (15 min) after oral administration of 4.8 mg/kg arctigenin
