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发明人李文辉,刘建华,徐明华. "A Process for Preparing High-Purity 6,7-Dihydro-5H-pyrazolo[5,1-b][1,3]oxazin-2-amine" [P]. 中国发明专利, 专利号 CN 116515885 A, 授权公告日 2016-04-14.
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