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发明人孙丽萍,王建平,朱建伟. "A Process for Preparing High-Purity 2-(1-(2,3-Difluorobenzyl)-3-oxopiperazin-2-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 114589841 A, 授权公告日 2020-03-28.
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