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The typical MRM chromatograms of epiprogoitrin, progoitrin and IS in rat plasma sample: (A) blank plasma sample, (B) blank plasma samples spiked with IS (200 ng/mL), epiprogoitrin and progoitrin respectively (2 ng/mL), (C) plasma samples at 1 h after a single oral administration of analytes (25 mg/kg).
