发明人王建平,林芳,李文辉. "Method for the Synthesis of 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-oxo-4-(thiophen-2-yl)butanoic acid" [P]. 中国发明专利, 专利号 CN 111636963 A, 授权公告日 2017-02-06.
发明人刘建华,朱建伟,李文辉. "A Process for Preparing High-Purity 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-oxo-4-(thiophen-2-yl)butanoic acid" [P]. 中国发明专利, 专利号 CN 114407475 A, 授权公告日 2018-01-11.
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