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发明人赵玉洁,孙丽萍,唐晓军. "A Process for Preparing High-Purity 2-(4-Amino-5-(difluoromethyl)-2-methylpyridin-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 113070055 A, 授权公告日 2021-07-21.
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