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发明人王建平,沈红梅,胡光. "A Process for Preparing High-Purity Methyl 2-ethyl-3-oxo-2,3-dihydropyridazine-4-carboxylate" [P]. 中国发明专利, 专利号 CN 116660307 B, 授权公告日 2022-02-04.
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