发明人刘建华,唐晓军,罗永刚. "Method for the Synthesis of 8-(tert-Butoxycarbonyl)-5-oxa-8-azaspiro[3.5]nonane-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117275742 A, 授权公告日 2021-10-20.
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