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4-Chloro-5-hydroxypyridazin-3(2H)-one: BD16691264178-58-195%; ￥1759.05g

4-Chloro-5-methoxypyridazin-3(2H)-one: BD9605563910-43-098%; ￥1764.025g

4,5-Dichloro-3(2H)-pyridazinone: BD92532932-22-997%; ￥715.0500g

5-Amino-4-chloropyridazin-3(2H)-one: BD939376339-19-197%; ￥951.05g

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