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发明人冯建国,李文辉,郭海燕. "Method for the Synthesis of tert-Butyl 3-(pyrrolidin-1-yl)-1-oxa-8-azaspiro[4.5]decane-8-carboxylate" [P]. 中国发明专利, 专利号 CN 111991790 B, 授权公告日 2015-04-07.
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