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发明人朱建伟,郭海燕,罗永刚. "A Process for Preparing High-Purity (S)-4,4-difluoro-5-oxopyrrolidine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110852405 A, 授权公告日 2015-02-12.
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