5-amino-3,4-dihydro-4,7-dimethyl-2H-pyridazino<4,5-b>-1,4-oxazin-8(7H)-one

4-chloro-5-(2-diethylaminoethyl)-2-methyl-2H-pyridazino<3,4-b><1,4>benzoxazin-3(5H)-one

6-amino-5-chloro-4-<(2-hydroxyethyl)methylamino>-2-methyl-3(2H)-pyridazinone

6-amino-4-chloro-5-<(2-hydroxyethyl)methylamino>-2-methyl-3(2H)-pyridazinone