发明人孙丽萍,张德明,杨光. "Method for the Synthesis of 9-Benzyl-4-oxa-1,9-diazaspiro[5.5]undecane" [P]. 中国发明专利, 专利号 CN 114043996 A, 授权公告日 2022-09-11.
发明人胡光,陈志强,朱建伟. "A Process for Preparing High-Purity 9-Benzyl-4-oxa-1,9-diazaspiro[5.5]undecane" [P]. 中国发明专利, 专利号 CN 117735338 B, 授权公告日 2021-01-22.
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