Synonyms: BRN 0557473;1,4-Dichloro-5-ethyl-6H-pyridazino(4,5-b)carbazole;Dichloro-1,4 ethyl-5 6H-pyridazino(4,5-b)carbazole;6H-Pyridazino(4,5-b)carbazole, 1,4-dichloro-5-ethyl-;1,4-dichloro-5-ethyl-6H-pyridazino[4,5-b]carbazole;AC1NX6PB;LS-129684;59774-21-9