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发明人张德明,郭海燕,孙丽萍. "A Process for Preparing High-Purity tert-Butyl 2,7-diazaspiro[4.5]decane-2-carboxylate oxalate(2:1)" [P]. 中国发明专利, 专利号 CN 116186244 B, 授权公告日 2016-09-22.
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