发明人刘建华,冯建国,罗永刚. "Method for the Synthesis of 2-Cyclopentylidene-5-hydroxybenzofuran-3(2H)-one" [P]. 中国发明专利, 专利号 CN 117403774 B, 授权公告日 2021-05-26.
发明人胡光,黄志刚,王建平. "A Process for Preparing High-Purity 2-Cyclopentylidene-5-hydroxybenzofuran-3(2H)-one" [P]. 中国发明专利, 专利号 CN 113676432 B, 授权公告日 2015-03-02.
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