发明人张德明,沈红梅,陈志强. "Method for the Synthesis of tert-Butyl 2,8-dioxa-5-azaspiro[3.5]nonane-5-carboxylate" [P]. 中国发明专利, 专利号 CN 110801279 A, 授权公告日 2021-06-24.
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