1,2-Diaza-3,4:9,10-dibenzpyrene 189-58-2 4-23-00-02147 (Beilstein Handbook Reference) ANTHRA(9,1,2-cde)BENZO(h)CINNOLINE BRN 0027200 Dinaphtho(1,2,3-de:3',2',1'-ij)phthalazine NSC 30550