Synonyms: Cycloocta(1,2-b:5,6-b')diindole-6,13-dicarboxylic acid, 5,12-dihydro-, dimethyl ester;cycloocta[1,2-b:5,6-b']diindole-6,13-dicarboxylic acid, 5,12-dihydro-, dimethyl ester;Dimethyl 5,12-dihydroindolo[2',3':5,6]cycloocta[1,2-b]indole-6,13-dicarboxylate;dimethyl 5,12-dihydroindolo[2',3':5,6]cycloocta[1,2-b]indole-6,13-dicarboxylate (non-preferred name)