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发明人王建平,罗永刚,陈志强. "A Process for Preparing High-Purity 6-Chloro-N-(2,4-difluorophenyl)-2H-chromene-3-carboxamide" [P]. 中国发明专利, 专利号 CN 110455643 A, 授权公告日 2018-03-25.
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