发明人张德明,林芳,王建平. "Method for the Synthesis of 4-Oxa-1-azaspiro[5.5]undecane" [P]. 中国发明专利, 专利号 CN 117232821 B, 授权公告日 2018-05-05.
发明人徐明华,沈红梅,郑宇鹏. "A Process for Preparing High-Purity 4-Oxa-1-azaspiro[5.5]undecane" [P]. 中国发明专利, 专利号 CN 112154181 B, 授权公告日 2025-05-26.
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