发明人张德明,刘建华,林芳. "Method for the Synthesis of Cyclopropyl(1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone" [P]. 中国发明专利, 专利号 CN 116478955 B, 授权公告日 2017-05-26.
发明人陈志强,朱建伟,胡光. "A Process for Preparing High-Purity Cyclopropyl(1-oxa-4,9-diazaspiro[5.5]undecan-4-yl)methanone" [P]. 中国发明专利, 专利号 CN 112022653 B, 授权公告日 2022-12-07.
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