发明人杨光,陈志强,孙丽萍. "Method for the Synthesis of Tert-butyl 6,6-dimethyl-5-oxa-2,8-diazaspiro[3.5]Nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 111494223 B, 授权公告日 2019-10-08.
发明人刘建华,朱建伟,钱学锋. "A Process for Preparing High-Purity Tert-butyl 6,6-dimethyl-5-oxa-2,8-diazaspiro[3.5]Nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 115337921 A, 授权公告日 2021-06-14.
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