发明人郑宇鹏,李文辉,冯建国. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 112589012 A, 授权公告日 2017-03-05.
发明人马晓峰,冯建国,杨光. "Method for the Synthesis of 3-(4-Ethoxybenzenesulfonyl)-4-hydroxy-2-oxo-1,2-dihydroquinoline-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112382855 A, 授权公告日 2021-02-10.
发明人沈红梅,马晓峰,赵玉洁. "A Process for Preparing High-Purity 3-(4-Ethoxybenzenesulfonyl)-4-hydroxy-2-oxo-1,2-dihydroquinoline-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117231890 A, 授权公告日 2023-01-13.
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