发明人杨光,何建平,徐明华. "Method for the Synthesis of tert-Butyl 2,4-dioxo-1,3,7-triazaspiro[4.4]nonane-7-carboxylate" [P]. 中国发明专利, 专利号 CN 108914011 A, 授权公告日 2017-11-27.
发明人杨光,韩伟,黄志刚. "A Process for Preparing High-Purity tert-Butyl 2,4-dioxo-1,3,7-triazaspiro[4.4]nonane-7-carboxylate" [P]. 中国发明专利, 专利号 CN 113663513 A, 授权公告日 2020-09-23.
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