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发明人刘建华,孙丽萍,沈红梅. "A Process for Preparing High-Purity 1-(2,4-Dichlorophenyl)-4-hydroxy-6-oxo-1,6-dihydropyridazine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114190847 B, 授权公告日 2025-05-01.
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