发明人朱建伟,马晓峰,胡光. "Method for the Synthesis of (S)-1-ethyl-5-methylpiperazin-2-one" [P]. 中国发明专利, 专利号 CN 109496995 B, 授权公告日 2025-08-02.
发明人郭海燕,韩伟,冯建国. "A Process for Preparing High-Purity (S)-1-ethyl-5-methylpiperazin-2-one" [P]. 中国发明专利, 专利号 CN 112157988 B, 授权公告日 2018-04-09.
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