3,4-Dihydro-4-imino-3-methyl-7-(2,3,4,5-tetrahydro-5-methyl-3-oxo-6-pyridazinyl)quinazoline

4,5-Dihydro-6-(3-amino-4-cyanophenyl)-5-methyl-3(2H)-pyridazinone

(+/-)-4-(4-bromo-3-nitrophenyl)-3-methyl-4-oxobutyric acid

6-(4-bromo-3-nitrophenyl)-5-methyl-2,3,4,5-tetrahydropyridazin-3-one

4,5-Dihydro-6-(4-cyano-3-(ethoxymethyleneamino)phenyl)-5-methyl-3(2H)-pyridazinone