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发明人何建平,李文辉,徐明华. "A Process for Preparing High-Purity tert-Butyl 2-oxa-6,9-diazaspiro[4.5]decane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 114927459 B, 授权公告日 2021-07-18.
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