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发明人郑宇鹏,陈志强,张德明. "A Process for Preparing High-Purity 4-(2,5-Difluorobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111848022 B, 授权公告日 2017-08-25.
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