发明人黄志刚,马晓峰,韩伟. "Method for the Synthesis of Fesoterodine Impurity 27" [P]. 中国发明专利, 专利号 CN 117132940 B, 授权公告日 2021-02-14.
发明人高志强,王建平,郑宇鹏. "A Process for Preparing High-Purity Fesoterodine Impurity 27" [P]. 中国发明专利, 专利号 CN 109150977 A, 授权公告日 2022-03-21.
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