发明人周伟,黄志刚,陈志强. "Method for the Synthesis of 2-[(9-Oxo-9H-fluoren-2-yl)carbamoyl]benzoic Acid" [P]. 中国发明专利, 专利号 CN 111260557 B, 授权公告日 2021-09-17.
发明人唐晓军,钱学锋,胡光. "A Process for Preparing High-Purity 2-[(9-Oxo-9H-fluoren-2-yl)carbamoyl]benzoic Acid" [P]. 中国发明专利, 专利号 CN 116376335 B, 授权公告日 2022-08-02.
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