发明人陈志强,周伟,孙丽萍. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109453836 A, 授权公告日 2017-12-11.
发明人何建平,赵玉洁,杨光. "Method for the Synthesis of Rac-(1r,3r)-3-({[(9h-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutane-1-carboxylic acid, trans" [P]. 中国发明专利, 专利号 CN 109518914 A, 授权公告日 2018-05-19.
发明人李文辉,郑宇鹏,胡光. "A Process for Preparing High-Purity Rac-(1r,3r)-3-({[(9h-fluoren-9-yl)methoxy]carbonyl}amino)cyclobutane-1-carboxylic acid, trans" [P]. 中国发明专利, 专利号 CN 114017617 B, 授权公告日 2022-07-24.
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