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发明人李文辉,郭海燕,沈红梅. "Method for the Synthesis of 3,4-dimethylpyrrolidin-2-one" [P]. 中国发明专利, 专利号 CN 109708289 A, 授权公告日 2022-07-21.
发明人唐晓军,马晓峰,胡光. "A Process for Preparing High-Purity 3,4-dimethylpyrrolidin-2-one" [P]. 中国发明专利, 专利号 CN 109036135 A, 授权公告日 2022-11-26.
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