发明人徐明华,周伟,陈志强. "Method for the Synthesis of (Z)-4-((4-Aminophenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 109341003 B, 授权公告日 2016-05-02.
发明人杨光,罗永刚,高志强. "A Process for Preparing High-Purity (Z)-4-((4-Aminophenyl)amino)-4-oxobut-2-enoic acid" [P]. 中国发明专利, 专利号 CN 110817702 A, 授权公告日 2017-01-27.
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