发明人赵玉洁,陈志强,林芳. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116648873 A, 授权公告日 2017-04-16.
发明人赵玉洁,徐明华,郭海燕. "Method for the Synthesis of tert-Butyl (R)-3-methyl-5-oxo-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 117742572 B, 授权公告日 2018-09-18.
发明人周伟,冯建国,何建平. "A Process for Preparing High-Purity tert-Butyl (R)-3-methyl-5-oxo-1-oxa-4,9-diazaspiro[5.5]undecane-9-carboxylate" [P]. 中国发明专利, 专利号 CN 112854296 B, 授权公告日 2017-07-26.
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