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发明人刘建华,陈志强,孙丽萍. "A Process for Preparing High-Purity O1-tert-butyl O5-ethyl 4-hydroxy-3,6-dihydro-2H-pyridine-1,5-dicarboxylate" [P]. 中国发明专利, 专利号 CN 110819969 B, 授权公告日 2018-03-22.
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