发明人徐明华,林芳,刘建华. "一种盐酸乙胺丁醇EP杂质A的合成方法" [P]. 中国发明专利, 专利号 CN 117531675 A, 授权公告日 2023-07-16.
发明人王建平,沈红梅,朱建伟. "Method for the Synthesis of Ethambutol Hydrochloride EP Impurity A" [P]. 中国发明专利, 专利号 CN 110658649 B, 授权公告日 2020-01-17.
发明人朱建伟,沈红梅,何建平. "A Process for Preparing High-Purity Ethambutol Hydrochloride EP Impurity A" [P]. 中国发明专利, 专利号 CN 111328076 B, 授权公告日 2018-10-07.
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