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发明人马晓峰,周伟,郭海燕. "A Process for Preparing High-Purity Di-tert-butyl 8-oxo-5-azaspiro[2.5]Octane-1,5-dicarboxylate" [P]. 中国发明专利, 专利号 CN 109898797 A, 授权公告日 2017-05-25.
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