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发明人赵玉洁,林芳,郑宇鹏. "A Process for Preparing High-Purity Methyl 6-methyl-4-oxo-1,4-dihydropyridazine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 117975447 B, 授权公告日 2020-08-26.
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