Automated software-guided identification of new buspirone metabolites using capillary LC coupled to ion trap and TOF mass spectrometry
The document details a systematic approach for identifying drug metabolites, specifically focusing on buspirone. It utilizes an incubation strategy with rat liver S9 fractions followed by analysis via capillary liquid chromatography (LC) coupled with two complementary mass spectrometric techniques: the Agilent MSD Trap XCT ion trap and the LC/MSD TOF.
The study highlights the use of automated data-dependent acquisition in the ion trap MS to detect unexpected metabolites co-eluting with major peaks. By combining this with accurate mass measurements from the ESI oaTOF instrument, the authors postulated structures for five previously unreported metabolites using ACD/Labs software tools.
The reaction was carried out at 37° C for 60 minutes.
The flow rate was set to 4 L/min.
The analysis selected a number of three precursors.