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发明人刘建华,林芳,周伟. "A Process for Preparing High-Purity Tert-butyl 7-hydroxy-7-methyl-5-oxa-2-azaspiro[3.4]Octane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 109397133 A, 授权公告日 2020-03-15.
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