Synonyms: 2H-Benzimidazol-2-one, 1-[3-[4-(5-chloro-2,3-dihydro-2-oxo-1H-benzimidazol-1-yl)-1-piperidinyl]propyl]-3-[3-(2,3-dihydro-2-oxo-1H-benzimidazol-1-yl)propyl]-1,3-dihydro-, 1-[3-[4-(5-Chloro-2-oxo-2,3-dihydro-1H-benzimidazol-1-yl)piperidin-1-yl]propyl]-3-[3-(2-oxo-2,3-dihydrobenzimidazol-1-yl)-propyl]-1,3-dihydro-2H-benzimidazol-2-one, Domperidone EP Impurity E