发明人何建平,林芳,罗永刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 108465382 A, 授权公告日 2019-01-14.
发明人张德明,郭海燕,郑宇鹏. "Method for the Synthesis of 4-((4-(N-(2,4-dimethylphenyl)sulfamoyl)phenyl)amino)-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 108161321 B, 授权公告日 2017-07-01.
发明人唐晓军,郑宇鹏,杨光. "A Process for Preparing High-Purity 4-((4-(N-(2,4-dimethylphenyl)sulfamoyl)phenyl)amino)-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 114765173 B, 授权公告日 2016-02-04.
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