发明人李文辉,黄志刚,韩伟. "Method for the Synthesis of 2-Azaspiro[4.4]nonane" [P]. 中国发明专利, 专利号 CN 109385842 B, 授权公告日 2022-03-20.
发明人韩伟,王建平,郑宇鹏. "A Process for Preparing High-Purity 2-Azaspiro[4.4]nonane" [P]. 中国发明专利, 专利号 CN 110066809 B, 授权公告日 2015-09-14.
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