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发明人钱学锋,李文辉,张德明. "A Process for Preparing High-Purity 2-(4-(Chloromethyl)-6-(difluoromethyl)-5-(trifluoromethoxy)pyridin-2-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 112954849 A, 授权公告日 2021-01-16.
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