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发明人王建平,赵玉洁,杨光. "Method for the Synthesis of Tert-butyl2,2-difluoro-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 111971273 A, 授权公告日 2017-05-28.
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