发明人孙丽萍,何建平,周伟. "Method for the Synthesis of Tert-butyl 4-methyl-1-oxa-4,9-diazaspiro[5.5]Undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 116466610 B, 授权公告日 2021-04-01.
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