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发明人张德明,徐明华,黄志刚. "A Process for Preparing High-Purity 6-Hydroxy-2-(pyridin-2-yl)pyrimidine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114076318 B, 授权公告日 2018-10-19.
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