Sørensen M, Martínez F, Björnsson E. "一种的合成方法" [P]. European Patent, EP 3852969 A1, 2016-09-27.
发明人冯建国,徐明华,张德明. "Method for the Synthesis of 1-((((9H-fluoren-9-yl)methoxy)carbonyl)amino)-3-(difluoromethyl)cyclobutane-1-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110161197 B, 授权公告日 2023-03-28.
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