发明人杨光,徐明华,林芳. "Method for the Synthesis of 4-Oxo-3-azaspiro[5.5]undecane-11-carboxylicacid" [P]. 中国发明专利, 专利号 CN 109499484 B, 授权公告日 2023-12-17.
发明人林芳,黄志刚,马晓峰. "A Process for Preparing High-Purity 4-Oxo-3-azaspiro[5.5]undecane-11-carboxylicacid" [P]. 中国发明专利, 专利号 CN 110936736 B, 授权公告日 2017-03-16.
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