3-chloropyrido[1,2-a]benzimidazole-1,4-dicarbonitrile InChI=1/C13H5ClN4/c14-10-5-8(6-15)18-12-4-2-1-3-11(12)17-13(18)9(10)7-16/h1-5 pyrido[1,2-a]benzimidazole-1,4-dicarbonitrile, 3-chloro-