3-(Diethylamino)-7-oxo-7H-(1)benzopyrano(3',2':3,4)pyrido(1,2-a)benzimidazole-6-carbonitrile 52372-36-8 7H-(1)Benzopyrano(3',2':3,4)pyrido(1,2-a)benzimidazole-6-carbonitrile, 3-(diethylamino)-7-oxo- EINECS 257-884-8