Fig. 2.

(a) High-pressure liquid chromatography with UV detector (HPLC-UV) chromatogram of (±)-renzapride N-oxide standard solution (1 mg/mL in acetonitrile). (b) HPLC-UV chromatogram of (±)-renzapride and (±)-renzapride N-oxide standard solutions (1 mg/mL in acetonitrile). (c) HPLC-UV chromatogram of sample from human liver microsome incubation (60 min) with (±)-renzapride and N-oxide reference standard (1 mg/mL in acetonitrile). ± signifies racemate of (+) and (−) enantiomers present in equal proportions.