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发明人孙丽萍,刘建华,张德明. "A Process for Preparing High-Purity 1-Ethyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117519841 A, 授权公告日 2019-06-26.
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