发明人李文辉,孙丽萍,徐明华. "Method for the Synthesis of Ethyl 2-oxo-2H-chromene-4-carboxylate" [P]. 中国发明专利, 专利号 CN 109317155 B, 授权公告日 2023-01-05.
Nielsen H, Jørgensen K, Lefèvre J P. "A Process for Preparing High-Purity Ethyl 2-oxo-2H-chromene-4-carboxylate" [P]. European Patent, EP 3990538 A1, 2015-02-20.
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