发明人王建平,孙丽萍,唐晓军. "Method for the Synthesis of 9-Oxa-1,4-diaza-spiro[5.5]undecan-5-one" [P]. 中国发明专利, 专利号 CN 111381875 A, 授权公告日 2022-02-06.
发明人高志强,郑宇鹏,杨光. "A Process for Preparing High-Purity 9-Oxa-1,4-diaza-spiro[5.5]undecan-5-one" [P]. 中国发明专利, 专利号 CN 109536700 A, 授权公告日 2016-12-15.
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