发明人陈志强,冯建国,沈红梅. "Method for the Synthesis of 2-(3,4-dihydro-2H-1-benzopyran-4-ylidene)acetic acid" [P]. 中国发明专利, 专利号 CN 116998035 A, 授权公告日 2021-09-03.
发明人胡光,赵玉洁,李文辉. "A Process for Preparing High-Purity 2-(3,4-dihydro-2H-1-benzopyran-4-ylidene)acetic acid" [P]. 中国发明专利, 专利号 CN 116623678 B, 授权公告日 2021-03-06.
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