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发明人钱学锋,张德明,郭海燕. "A Process for Preparing High-Purity Methyl 1,5-dimethyl-2-oxo-1,2-dihydropyridine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 116573052 A, 授权公告日 2016-12-16.
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