发明人黄志刚,韩伟,冯建国. "Method for the Synthesis of (Z)-4-((3,4-dimethoxyphenethyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 111883211 B, 授权公告日 2016-05-05.
发明人沈红梅,陈志强,王建平. "A Process for Preparing High-Purity (Z)-4-((3,4-dimethoxyphenethyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 116915384 A, 授权公告日 2016-11-18.
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