发明人孙丽萍,王建平,李文辉. "Method for the Synthesis of 4-{2-[4-(2,4-Dimethylanilino)-4-oxobutanoyl]hydrazino}-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 117450931 A, 授权公告日 2025-02-13.
发明人杨光,沈红梅,周伟. "A Process for Preparing High-Purity 4-{2-[4-(2,4-Dimethylanilino)-4-oxobutanoyl]hydrazino}-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 108670120 B, 授权公告日 2024-05-08.
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