发明人钱学锋,朱建伟,陈志强. "Method for the Synthesis of Ethyl 7-chloro-6-(difluoromethoxy)-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylate" [P]. 中国发明专利, 专利号 CN 115650878 A, 授权公告日 2020-09-07.
发明人唐晓军,刘建华,杨光. "A Process for Preparing High-Purity Ethyl 7-chloro-6-(difluoromethoxy)-1-ethyl-4-oxo-1,4-dihydroquinoline-3-carboxylate" [P]. 中国发明专利, 专利号 CN 114609687 B, 授权公告日 2016-10-26.
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