发明人李文辉,王建平,钱学锋. "一种新斯的明杂质32的合成方法" [P]. 中国发明专利, 专利号 CN 109950459 A, 授权公告日 2019-10-26.
发明人李文辉,何建平,刘建华. "Method for the Synthesis of Neostigmine impurity 32" [P]. 中国发明专利, 专利号 CN 116031774 B, 授权公告日 2021-10-08.
发明人唐晓军,郭海燕,罗永刚. "A Process for Preparing High-Purity Neostigmine impurity 32" [P]. 中国发明专利, 专利号 CN 111854378 B, 授权公告日 2021-01-15.
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