2,2'-Azobiphenyl 230-17-1 3,4-Benzocinnoline 5,6-Diazaphenanthrene 5,6-Phenanthroline 9,10-Diazaphenanthrene AI3-20950 BENZO(C)CINNOLINE Diphenylenazone EINECS 205-936-5 NSC 86935 Phenazone (VAN)