4-[amino(methyl)amino]-5-chloro-1H-pyridazin-6-one

4,5-dichloro-2-(4-chlorobenzoyl)pyridazin-3-one

4,5-二氯-2-羟基甲基-2,3-二氢哒嗪-3-酮

4,5-dichloro-2-(chloromethyl)pyridazin-3-one

2-苄基-4-氯-5-甲氧基-3(2H-)-吡嗪酮