1,2-Diaza-3,4:9,10-dibenzpyrene 189-58-2 Anthra[9,1,2-cde]benzo[h]cinnoline Dinaphtho[1,2,3-de:3',2',1'-ij]phthalazine NSC30550 WLN: T D5 B666 O666 2AB A & ON RNJ