2,9-Diazafluorene 2-Azacarbazole 244-63-3 5-23-08-00220 (Beilstein Handbook Reference) 7259-44-1 9H-Pyrido(3,4-b)indole BRN 0128414 CCRIS 6915 Carbazoline Carbazoline (VAN) EINECS 205-959-0 NSC 84417 Norharman Norharmane beta-Carboline