发明人周伟,张德明,刘建华. "Method for the Synthesis of tert-Butyl 6-ethynyl-6-hydroxy-2-azaspiro[3.3]heptane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 111426597 B, 授权公告日 2020-11-14.
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