发明人冯建国,罗永刚,何建平. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113100216 A, 授权公告日 2018-04-03.
发明人朱建伟,李文辉,唐晓军. "Method for the Synthesis of [(5s)-spiro[5,7-dihydrocyclopenta[b]pyridine-6,4-piperidin-1-ium]-5-yl]ammonium;dichloride" [P]. 中国发明专利, 专利号 CN 116404728 A, 授权公告日 2022-12-19.
发明人胡光,郑宇鹏,钱学锋. "A Process for Preparing High-Purity [(5s)-spiro[5,7-dihydrocyclopenta[b]pyridine-6,4-piperidin-1-ium]-5-yl]ammonium;dichloride" [P]. 中国发明专利, 专利号 CN 109766162 B, 授权公告日 2015-09-03.
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