1,2,3,4-Dibenzphenazine 1,2:3,4-Dibenzophenazine 215-64-5 9,14-Diazadibenz[a,c]anthracene Dibenzo[a,c]phenazine NSC6945 Phenanthrazine Phenanthro-9',10':2,3-quinoxaline Phenanthro[9,10-b]quinoxaline WLN: T J6 D6 C666 BN QNJ