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发明人郭海燕,周伟,高志强. "A Process for Preparing High-Purity 1-Ethyl-4-hydroxy-2-oxo-1,2-dihydroquinoline-3-carbohydrazide" [P]. 中国发明专利, 专利号 CN 110274877 B, 授权公告日 2015-05-24.
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