Synonyms: BRN 0551673;1H-Pyridazino(4,5-b)carbazole-1,4(6H)-dione, 2,3-dihydro-5-ethyl-;2,3-Dihydro-5-ethyl-1H-pyridazino(4,5-b)carbazole-1,4(6H)-dione;Dioxo-1,4 ethyl-5 tetrahydro-1,2,3,4 6H-pyridazino(4,5-b)carbazole;AC1MIDE9;LS-129689;5-ethyl-3,6-dihydro-2H-pyridazino[4,5-b]carbazole-1,4-dione;59774-16-2