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发明人李文辉,郭海燕,周伟. "A Process for Preparing High-Purity 1-Amino-4-(furan-2-yl)-2-imino-1,2-dihydropyridine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 111307384 B, 授权公告日 2018-05-04.
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