发明人冯建国,沈红梅,胡光. "Method for the Synthesis of 4-((2,5-Dimethoxyphenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 108830452 B, 授权公告日 2022-06-19.
Lee S K, Klinger H, Davis P L. "A Process for Preparing High-Purity 4-((2,5-Dimethoxyphenyl)amino)-4-oxobut-2-enoic acid" [P]. US Patent, US 9701498 B2, 2022-04-21.
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