发明人黄志刚,钱学锋,马晓峰. "一种倍他洛尔EP杂质E的合成方法" [P]. 中国发明专利, 专利号 CN 117163984 A, 授权公告日 2016-11-27.
发明人杨光,王建平,胡光. "Method for the Synthesis of Betaxolol EP Impurity E" [P]. 中国发明专利, 专利号 CN 109229104 A, 授权公告日 2016-09-26.
发明人刘建华,李文辉,黄志刚. "A Process for Preparing High-Purity Betaxolol EP Impurity E" [P]. 中国发明专利, 专利号 CN 111314196 B, 授权公告日 2019-08-06.
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