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发明人徐明华,钱学锋,胡光. "A Process for Preparing High-Purity tert-Butyl 1,3-dioxo-2,7-diazaspiro[4.5]decane-7-carboxylate" [P]. 中国发明专利, 专利号 CN 109577791 B, 授权公告日 2024-08-12.
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