发明人张德明,韩伟,刘建华. "Method for the Synthesis of 5,8-Diaza-spiro[3.5]nonane-5-carboxylic acid tert-butyl ester hydrochloride" [P]. 中国发明专利, 专利号 CN 114350386 B, 授权公告日 2019-11-10.
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