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发明人李文辉,郭海燕,何建平. "A Process for Preparing High-Purity Ethyl 5,8-dimethoxy-4-thioxo-1,4-dihydroquinoline-3-carboxylate" [P]. 中国发明专利, 专利号 CN 111128817 A, 授权公告日 2024-07-17.
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