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发明人郭海燕,林芳,王建平. "A Process for Preparing High-Purity 2,2-Difluoro-2-(1-methyl-1H-pyrazol-5-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 113455600 B, 授权公告日 2020-02-13.
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