发明人何建平,黄志刚,王建平. "Method for the Synthesis of 4,4'-(1,3-Phenylenebis(azanediyl))bis(4-oxobut-2-enoic acid)" [P]. 中国发明专利, 专利号 CN 114438152 A, 授权公告日 2017-04-15.
发明人林芳,沈红梅,徐明华. "A Process for Preparing High-Purity 4,4'-(1,3-Phenylenebis(azanediyl))bis(4-oxobut-2-enoic acid)" [P]. 中国发明专利, 专利号 CN 115745134 A, 授权公告日 2022-04-23.
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