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发明人张德明,罗永刚,沈红梅. "A Process for Preparing High-Purity 2-(4-Chloro-5-(difluoromethyl)-6-fluoropyridin-2-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 117877972 B, 授权公告日 2017-01-15.
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