发明人唐晓军,黄志刚,高志强. "Method for the Synthesis of 阿福特罗杂质" [P]. 中国发明专利, 专利号 CN 111808967 A, 授权公告日 2015-04-07.
发明人冯建国,林芳,周伟. "A Process for Preparing High-Purity 阿福特罗杂质" [P]. 中国发明专利, 专利号 CN 114723404 B, 授权公告日 2023-07-16.
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