Abstract
A highly sensitive, specific and high-throughput LC-ESI-MS/MS method in the positive mode has been developed and validated for the quantitation of Orteronel® (TAK-700) in rat plasma using YM-55208 as an internal standard. The assay procedure involves extraction of Orteronel and internal standard from rat plasma with liquid-liquid extraction method. Chromatographic separation was achieved using an isocratic mobile phase at a flow rate of 0.6 ml/min on an Atlantis dC18 column with a total run time of 2.5 min. The MS/MS ion transitions monitored were m/z 308.4→95.0 for Orteronel and m/z 262.3→194.2 for IS. Method validation was performed as per US FDA guidelines. The LLOQ achieved was 0.42 ng/ml and the linearity range extended from 0.42 to 814 ng/ml. The results met the acceptance criteria. The validated method was successfully applied to characterize the pharmacokinetic parameters of Orteronel in rat plasma.
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