发明人杨光,冯建国,钱学锋. "Method for the Synthesis of Ethyl 4-((1-methyl-2,5-dioxo-2,5-dihydro-1H-pyrrol-3-yl)amino)benzoate" [P]. 中国发明专利, 专利号 CN 117831624 A, 授权公告日 2018-04-21.
发明人胡光,刘建华,赵玉洁. "A Process for Preparing High-Purity Ethyl 4-((1-methyl-2,5-dioxo-2,5-dihydro-1H-pyrrol-3-yl)amino)benzoate" [P]. 中国发明专利, 专利号 CN 117933204 A, 授权公告日 2015-06-07.
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