发明人李文辉,周伟,罗永刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 112913196 A, 授权公告日 2021-03-12.
发明人唐晓军,张德明,孙丽萍. "Method for the Synthesis of 4-Methyl-1,4-diazaspiro[5.5]Undecane" [P]. 中国发明专利, 专利号 CN 114883153 B, 授权公告日 2019-04-04.
发明人李文辉,罗永刚,孙丽萍. "A Process for Preparing High-Purity 4-Methyl-1,4-diazaspiro[5.5]Undecane" [P]. 中国发明专利, 专利号 CN 116715092 B, 授权公告日 2015-07-14.
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