3,6-Diamino-9-ethylcarbazole 5-22-11-00316 (Beilstein Handbook Reference) 50717-02-7 9H-Carbazole-3,6-diamine, 9-ethyl- (9CI) BRN 0203515 CARBAZOLE, 3,6-DIAMINO-9-ETHYL- NSC 49771