发明人李文辉,何建平,刘建华. "Method for the Synthesis of 1,4-dimethylpiperazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117337922 B, 授权公告日 2018-10-06.
发明人孙丽萍,罗永刚,李文辉. "A Process for Preparing High-Purity 1,4-dimethylpiperazine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117503590 A, 授权公告日 2023-02-27.
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