发明人沈红梅,李文辉,唐晓军. "Method for the Synthesis of (2Z,2'Z)-4,4'-(ethane-1,2-diylbis(azanediyl))bis(4-oxobut-2-enoic acid)" [P]. 中国发明专利, 专利号 CN 110643609 A, 授权公告日 2021-10-11.
发明人马晓峰,郭海燕,陈志强. "A Process for Preparing High-Purity (2Z,2'Z)-4,4'-(ethane-1,2-diylbis(azanediyl))bis(4-oxobut-2-enoic acid)" [P]. 中国发明专利, 专利号 CN 112991335 B, 授权公告日 2020-06-09.
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