1H-pyrrole-2,5-dione, 3-(6-bromo-1H-indol-3-yl)-4-(1H-imidazol-5-yl)- 3-(6-bromo-1H-indol-3-yl)-4-(1H-imidazol-5-yl)-1H-pyrrole-2,5-dione InChI=1/C15H9BrN4O2/c16-7-1-2-8-9(4-18-10(8)3-7)12-13(11-5-17-6-19-11)15(22)20-14(12)21/h1-6,18H,(H,17,19)(H,20,21,22