发明人黄志刚,郭海燕,刘建华. "Method for the Synthesis of Glycopyrronium Bromide EP Impurity K" [P]. 中国发明专利, 专利号 CN 112785226 A, 授权公告日 2025-02-24.
发明人张德明,朱建伟,孙丽萍. "A Process for Preparing High-Purity Glycopyrronium Bromide EP Impurity K" [P]. 中国发明专利, 专利号 CN 108788615 B, 授权公告日 2017-11-28.
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