Quantification of a potential anticonvulsant drug GIZh-298 in rat plasma by liquid chromatography-mass spectrometry

GIZh-298 is a new derivative of 4-phenylpyrrolidone with anticonvulsant and nootropic effects. A selective and sensitive HPLC-MS technique for the quantitative determination of GIZh-298 in rat blood plasma has been developed and validated. The linearity of the technique was confirmed by a high correlation coefficient (>0.99). Recovery of GIZh-298 from blood plasma averaged 73.4 ±3.4 %. Accuracy during one working cycle and between cycles was < 4.01%, precision < 8.03 %. The study of the stability of GIZh-298 revealed that the target compound is stable in a biomatrix at room temperature (4 h), when it is in a thermostatically controlled autosampler (8 °C) during an analytical experiment, with prolonged storage at -50 ° C for 30 days, and also if it is subjected to several freeze-thaw cycles (3 cycle). The pharmacokinetics of GIZh-298 in rat blood plasma after a single intravenous injection at a dose of 60 mg/kg was studied.