发明人马晓峰,杨光,何建平. "Method for the Synthesis of 3-Amino-6-ethylbenzofuran-2-carbonitrile" [P]. 中国发明专利, 专利号 CN 112951860 B, 授权公告日 2015-07-23.
发明人张德明,刘建华,胡光. "A Process for Preparing High-Purity 3-Amino-6-ethylbenzofuran-2-carbonitrile" [P]. 中国发明专利, 专利号 CN 115325938 B, 授权公告日 2024-01-15.
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