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发明人徐明华,冯建国,刘建华. "A Process for Preparing High-Purity Benzyl 3,9-diazaspiro[5.6]Dodecane-3-carboxylate" [P]. 中国发明专利, 专利号 CN 111809852 A, 授权公告日 2020-03-16.
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