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发明人李文辉,张德明,林芳. "A Process for Preparing High-Purity Tert-butyl (6R)-8-oxa-2,11-diazaspiro[5.6]dodecane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 117586223 A, 授权公告日 2016-01-12.
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