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发明人李文辉,罗永刚,孙丽萍. "A Process for Preparing High-Purity 4-Chloro-2-(4-methoxyphenyl)-7,8-dihydro-5H-pyrano[4,3-d]pyrimidine" [P]. 中国发明专利, 专利号 CN 111894841 A, 授权公告日 2019-08-08.
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