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发明人张德明,沈红梅,朱建伟. "Method for the Synthesis of (E)-4-((3-cyanophenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 114982289 B, 授权公告日 2016-11-17.
发明人唐晓军,孙丽萍,钱学锋. "A Process for Preparing High-Purity (E)-4-((3-cyanophenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 110194783 B, 授权公告日 2021-03-10.
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