发明人黄志刚,陈志强,高志强. "Method for the Synthesis of 5-Methyl-2-oxa-5,8-diazaspiro[3.5]nonane" [P]. 中国发明专利, 专利号 CN 115632533 B, 授权公告日 2023-11-07.
发明人郭海燕,朱建伟,赵玉洁. "A Process for Preparing High-Purity 5-Methyl-2-oxa-5,8-diazaspiro[3.5]nonane" [P]. 中国发明专利, 专利号 CN 109719964 A, 授权公告日 2017-07-02.
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