Synonyms: 4-(5-Chloro-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)-1-formylpiperidine, Domperidone Imp. B (EP), 1-Piperidinecarboxaldehyde, 4-(5-chloro-2,3-dihydro-2-oxo-1H-benzimidazol-1-yl)- (ACI), 4-(5-Chloro-2,3-dihydro-2-oxo-1H-benzimidazol-1-yl)-1-piperidinecarboxaldehyde (ACI)