Synonyms: 3-Methyl-1-oxo-1,5-dihydro-benzo[4,5]imidazo[1,2-a]pyridine-4-carbonitrile;3-Methyl-1-oxo-1,5-dihydropyrido[1,2-a]benzimidazole-4-carbonitrile;Pyrido[1,2-a]benzimidazol-4-carbonitrile, 1,5-dihydro-3-methyl-1-oxo-;Pyrido[1,2-a]benzimidazole-4-carbonitrile, 1,5-dihydro-3-methyl-1-oxo-