发明人韩伟,周伟,徐明华. "Method for the Synthesis of 2-(Tert-butyl) 9-methyl 2-azaspiro[5.5]Undecane-2,9-dicarboxylate" [P]. 中国发明专利, 专利号 CN 117918251 A, 授权公告日 2016-09-27.
发明人刘建华,罗永刚,马晓峰. "A Process for Preparing High-Purity 2-(Tert-butyl) 9-methyl 2-azaspiro[5.5]Undecane-2,9-dicarboxylate" [P]. 中国发明专利, 专利号 CN 110384046 A, 授权公告日 2022-03-05.
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