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发明人罗永刚,孙丽萍,胡光. "A Process for Preparing High-Purity 7-Methoxy-4-oxo-1,4-dihydroquinoline-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 111433335 A, 授权公告日 2018-12-19.
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