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发明人赵玉洁,郑宇鹏,林芳. "A Process for Preparing High-Purity tert-Butyl 1,6-diazaspiro[3.5]nonane-6-carboxylate oxalate(2:1)" [P]. 中国发明专利, 专利号 CN 115257721 B, 授权公告日 2018-04-07.
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