1,2-Benzcarbazole 1,2-Benzocarbazole 11-Azachrysofluorene 11H-Benzo(a)carbazole 239-01-0 5-20-08-00456 (Beilstein Handbook Reference) BENZO(A)CARBAZOLE BRN 0155940 EINECS 205-945-4 NSC 403640