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发明人郭海燕,赵玉洁,刘建华. "Method for the Synthesis of 4-[(2-cyanophenyl)carbamoyl]butanoic acid" [P]. 中国发明专利, 专利号 CN 117966409 B, 授权公告日 2020-08-20.
Nowak P, Schröder R, Nielsen H. "A Process for Preparing High-Purity 4-[(2-cyanophenyl)carbamoyl]butanoic acid" [P]. European Patent, EP 3106684 A1, 2024-02-12.
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