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发明人徐明华,林芳,赵玉洁. "A Process for Preparing High-Purity Methyl 1-methyl-6-oxo-1,6-dihydropyridine-2-carboxylate" [P]. 中国发明专利, 专利号 CN 117249916 B, 授权公告日 2017-10-28.
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