发明人朱建伟,刘建华,李文辉. "Method for the Synthesis of 2-((7-Nitrobenzofuran-4-yl)amino)ethanesulfonic acid" [P]. 中国发明专利, 专利号 CN 115430482 A, 授权公告日 2021-07-06.
发明人张德明,冯建国,徐明华. "A Process for Preparing High-Purity 2-((7-Nitrobenzofuran-4-yl)amino)ethanesulfonic acid" [P]. 中国发明专利, 专利号 CN 109336531 A, 授权公告日 2016-08-24.
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