发明人马晓峰,李文辉,孙丽萍. "Method for the Synthesis of 3-Methoxy-4-(2-oxo-2-(o-tolylamino)ethoxy)benzoic acid" [P]. 中国发明专利, 专利号 CN 108469940 B, 授权公告日 2023-08-11.
发明人胡光,沈红梅,冯建国. "A Process for Preparing High-Purity 3-Methoxy-4-(2-oxo-2-(o-tolylamino)ethoxy)benzoic acid" [P]. 中国发明专利, 专利号 CN 114316559 B, 授权公告日 2024-10-27.
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