1 CRR 3,4-di-1h-indol-3-yl-1h-pyrrole-2,5-dicarboxylic acid 1.000 2 2CC 3,4-bis(7-chloro-1h-indol-3-yl)-1h-pyrrole-2,5-dicarboxylic acid 0.935 3 7CK 7-carboxy-5-hydroxy-12,13-dihydro-6h-indolo[2,3-a]pyrrolo[3,4-C]carbazole 0.806 4 KCT (5s)-7-oxo-6,7,12,13-tetrahydro-5h-indolo[2,3-a]pyrrolo[3,4-C]carbazole-5-carboxylic acid 0.806 5 7U8 Methyl 4-[5,6-bis(chloranyl)-1h-indol-3-yl]-3-(5-chloranyl-1h-indol-3-yl)-1h-pyrrole-2-carboxylate 0.735 6 K2C 6,7,12,13-tetrahydro-5h-indolo[2,3-a]pyrrolo[3,4-C]carbazol-5-one 0.710