发明人王建平,周伟,林芳. "Method for the Synthesis of 8-(tert-Butyl) 4-ethyl 3-oxo-2,8-diazaspiro[4.5]decane-4,8-dicarboxylate" [P]. 中国发明专利, 专利号 CN 111820495 B, 授权公告日 2015-11-15.
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