发明人刘建华,周伟,朱建伟. "Method for the Synthesis of 7-Methyl-2,7-diazaspiro[4.4]Nonan-3-one" [P]. 中国发明专利, 专利号 CN 111697002 B, 授权公告日 2021-10-05.
发明人杨光,钱学锋,林芳. "A Process for Preparing High-Purity 7-Methyl-2,7-diazaspiro[4.4]Nonan-3-one" [P]. 中国发明专利, 专利号 CN 113344680 B, 授权公告日 2020-04-19.
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