发明人杨光,沈红梅,黄志刚. "Method for the Synthesis of 2-[(Benzyloxy)carbonyl]-7-[(tert-butoxy)carbonyl]-2,7-diazaspiro[4.4]nonane-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109080807 A, 授权公告日 2025-04-19.
发明人张德明,孙丽萍,李文辉. "A Process for Preparing High-Purity 2-[(Benzyloxy)carbonyl]-7-[(tert-butoxy)carbonyl]-2,7-diazaspiro[4.4]nonane-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117233703 B, 授权公告日 2019-10-12.
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