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发明人郭海燕,徐明华,孙丽萍. "A Process for Preparing High-Purity 3-(2,2-Difluorobenzo[d][1,3]dioxol-5-yl)propanoic acid" [P]. 中国发明专利, 专利号 CN 113046535 B, 授权公告日 2021-12-06.
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