发明人张德明,马晓峰,钱学锋. "Method for the Synthesis of 2-(1-Methyl-4-piperidinylidene)acetic Acid Ethyl Ester" [P]. 中国发明专利, 专利号 CN 116981280 B, 授权公告日 2025-02-25.
发明人郭海燕,王建平,罗永刚. "A Process for Preparing High-Purity 2-(1-Methyl-4-piperidinylidene)acetic Acid Ethyl Ester" [P]. 中国发明专利, 专利号 CN 109564693 A, 授权公告日 2025-11-07.
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