Abstract
A method has been developed for the quantitation of N-[4-(5-bromo-2-pyrimidinyloxy)-3-methylphenyl]-N'-(2-dimethylamino-benzoyl)urea (BPU) and its metabolites in human plasma and urine. BPU and metabolites were separated on a C18 column with acetonitrile-water mobile phase containing 0.1% formic acid using isocratic flow for 5 min. The analytes were monitored by tandem mass spectrometry. Calibration curves were generated over the range of 2.5-500 ng/mL for BPU, mmBPU, and aminoBPU in plasma; and 0.1-20, 0.1-20, 0.5-100, 10-2000, 1-200, and 3-600 ng/mL for BPU, mmBPU, aminoBPU, G280, G308, and G322 in urine, respectively. The method has been successfully applied to study the pharmacokinetics of BPU.
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