23,30-Dihydro-5H-tetranaphtho(2,3-a:2',3'-a':2'',3''-i:2''',3'''-i')pyrrolo(2,3-c:5,4-c')dicarbazole-5,7,12,17,22,24,29,31(6H)-octone 82789-83-1 EINECS 280-030-0