Fischer A B, Thompson G K, O'Brien P Q. "一种格隆溴铵EP杂质G的合成方法" [P]. US Patent, US 10822156 B2, 2020-04-12.
发明人李文辉,朱建伟,林芳. "Method for the Synthesis of Glycopyrronium Bromide EP Impurity G" [P]. 中国发明专利, 专利号 CN 108269109 B, 授权公告日 2023-08-15.
发明人唐晓军,罗永刚,孙丽萍. "A Process for Preparing High-Purity Glycopyrronium Bromide EP Impurity G" [P]. 中国发明专利, 专利号 CN 116188617 A, 授权公告日 2025-12-14.
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