Synonyms: 2-(4-nitrophenyl)tetrahydro-1h-[1,2,4]triazolo[1,2-a]pyridazine-1,3(2h)-dione;AC1L4JE3;AC1Q21FO;AR-1C8094;1H-(1,2,4)Triazolo(1,2-a)pyridazine-1,3(2H)-dione, tetrahydro-2-(4-nitrohenyl)-;2-(4-nitrophenyl)-5,6,7,8-tetrahydro-[1,2,4]triazolo[1,2-a]pyridazine-1,3-dione