发明人马晓峰,韩伟,孙丽萍. "Method for the Synthesis of (E)-4-(2-(2-(4-ethylphenoxy)acetyl)hydrazinyl)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 108647905 A, 授权公告日 2023-02-14.
发明人刘建华,沈红梅,朱建伟. "A Process for Preparing High-Purity (E)-4-(2-(2-(4-ethylphenoxy)acetyl)hydrazinyl)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 112586700 A, 授权公告日 2019-03-12.
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