发明人林芳,刘建华,郑宇鹏. "Method for the Synthesis of 2-Oxo-1-azaspiro[3.3]heptane-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 116697319 A, 授权公告日 2023-05-11.
发明人徐明华,高志强,唐晓军. "A Process for Preparing High-Purity 2-Oxo-1-azaspiro[3.3]heptane-6-carbonitrile" [P]. 中国发明专利, 专利号 CN 113051178 A, 授权公告日 2023-10-11.
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