4-(4-chlorophenylthio)-2-methyl-1-(4-nitrophenyl)-pyridazine-3,6-dione
2-methyl-4-(4-methylphenylthio)-1-(4-nitrophenyl)-pyridazine-3,6-dione
2-methyl-1-(4-nitrophenyl)-4-phenylthiopyridazine-3,6-dione
6-chloro-5-morpholino-2-phenyl-3-pyridazinone
6-chloro-4-morpholino-2-phenyl-3-pyridazinone