发明人何建平,陈志强,周伟. "Method for the Synthesis of Edaravone Impurity 4" [P]. 中国发明专利, 专利号 CN 109890991 B, 授权公告日 2018-10-08.
发明人郑宇鹏,王建平,冯建国. "A Process for Preparing High-Purity Edaravone Impurity 4" [P]. 中国发明专利, 专利号 CN 110869253 A, 授权公告日 2015-08-16.
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