发明人郑宇鹏,林芳,刘建华. "Method for the Synthesis of 6-Chloro-7-ethoxy-2-oxo-2H-chromene-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113028308 A, 授权公告日 2017-12-25.
发明人高志强,唐晓军,郭海燕. "A Process for Preparing High-Purity 6-Chloro-7-ethoxy-2-oxo-2H-chromene-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111289202 A, 授权公告日 2017-02-18.
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