1H-benzimidazole, 2-(1H-pyrrol-2-yl)- 2-(1H-pyrrol-2-yl)-1H-benzimidazole InChI=1/C11H9N3/c1-2-5-9-8(4-1)13-11(14-9)10-6-3-7-12-10/h1-7,12H,(H,13,14