1H-pyrrole-2,5-dione, 3-(1H-imidazol-5-yl)-4-(1H-indol-3-yl)- 3-(1H-imidazol-5-yl)-4-(1H-indol-3-yl)-1H-pyrrole-2,5-dione InChI=1/C15H10N4O2/c20-14-12(9-5-17-10-4-2-1-3-8(9)10)13(15(21)19-14)11-6-16-7-18-11/h1-7,17H,(H,16,18)(H,19,20,21