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发明人冯建国,何建平,杨光. "A Process for Preparing High-Purity tert-Butyl 2-oxo-1-oxa-3,8-diazaspiro[4.5]decane-8-carboxylate" [P]. 中国发明专利, 专利号 CN 116251526 A, 授权公告日 2015-03-02.
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