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发明人胡光,钱学锋,陈志强. "Method for the Synthesis of (4E)-4-[2-(4-Fluorophenyl)hydrazin-1-ylidene]-3,4-dihydro-1H-2-benzopyran-1,3-dione" [P]. 中国发明专利, 专利号 CN 111243498 B, 授权公告日 2023-11-12.
发明人徐明华,林芳,沈红梅. "A Process for Preparing High-Purity (4E)-4-[2-(4-Fluorophenyl)hydrazin-1-ylidene]-3,4-dihydro-1H-2-benzopyran-1,3-dione" [P]. 中国发明专利, 专利号 CN 109714335 A, 授权公告日 2018-01-23.
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