发明人冯建国,赵玉洁,周伟. "Method for the Synthesis of (E)-4-((2,4-difluorophenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 115772225 B, 授权公告日 2025-04-02.
发明人钱学锋,胡光,郭海燕. "A Process for Preparing High-Purity (E)-4-((2,4-difluorophenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 116745499 A, 授权公告日 2018-02-01.
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