Dinaphthazine (CAS NO.258-76-4) is also called 5-23-10-00182 (Beilstein Handbook Reference) ; 6,13-Diazapentacene ; BRN 0020041 ; Dinaphtazin ; Dinaphtazin [German] ; NSC 92439 ; s-beta,beta-Dinaphthazine ; Dibenzo(b,i)phenazine .