Rossi M, Johansson L, Jørgensen K. "Method for the Synthesis of (S)-5-(((9H-fluoren-9-yl)methoxy)carbonyl)-5-azaspiro[2.3]Hexane-4-carboxylic acid" [P]. European Patent, EP 3434782 A1, 2023-08-04.
发明人张德明,徐明华,林芳. "A Process for Preparing High-Purity (S)-5-(((9H-fluoren-9-yl)methoxy)carbonyl)-5-azaspiro[2.3]Hexane-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109727463 B, 授权公告日 2025-05-17.
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