Mueller T C, Martínez F, Rossi M. "一种的合成方法" [P]. European Patent, EP 3093704 A1, 2021-08-25.
发明人李文辉,何建平,王建平. "Method for the Synthesis of 4-Oxo-4-((9-oxo-9H-fluoren-2-yl)amino)butanoic acid" [P]. 中国发明专利, 专利号 CN 108479005 B, 授权公告日 2024-05-22.
发明人唐晓军,郭海燕,赵玉洁. "A Process for Preparing High-Purity 4-Oxo-4-((9-oxo-9H-fluoren-2-yl)amino)butanoic acid" [P]. 中国发明专利, 专利号 CN 117464875 A, 授权公告日 2025-06-26.
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