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发明人郑宇鹏,唐晓军,陈志强. "A Process for Preparing High-Purity (S)-Azetidine-2-carboxylic acid compound with 2,2,2-trifluoroacetic acid" [P]. 中国发明专利, 专利号 CN 108067112 A, 授权公告日 2015-11-14.
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