发明人赵玉洁,唐晓军,刘建华. "Method for the Synthesis of 5-Cyanobenzofuran-2-carboxylic Acid" [P]. 中国发明专利, 专利号 CN 112875026 B, 授权公告日 2017-01-11.
发明人黄志刚,朱建伟,陈志强. "A Process for Preparing High-Purity 5-Cyanobenzofuran-2-carboxylic Acid" [P]. 中国发明专利, 专利号 CN 109402792 B, 授权公告日 2022-01-07.
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