Metabolism of clebopride in vitro. Mass spectrometry and identification of products of amide hydrolysis and N-debenzylation

Abstract

1. Electron impact and field desorption mass spectrometry is described and discussed for clebopride, a newly developed benzamide with anti-emetic and anti-dopaminergic properties, and for some related compounds.

2. When clebopride was incubated with liver homogenates of rabbits, 4-amino-5-chloro-2-methoxybenzoic acid and N-(4′-piperidyl)-4-amino-5-chloro-5-methoxy-benzamide were identified as metabolites.