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发明人李文辉,徐明华,刘建华. "A Process for Preparing High-Purity N-Ethyl-5-hydroxy-1,2-dimethyl-6-oxo-1,6-dihydropyrimidine-4-carboxamide" [P]. 中国发明专利, 专利号 CN 110712630 B, 授权公告日 2017-09-16.
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