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发明人罗永刚,杨光,马晓峰. "Method for the Synthesis of 2-tert-butyl 8-ethyl 7-oxo-5-oxa-2-azaspiro[3.4]octane-2,8-dicarboxylate" [P]. 中国发明专利, 专利号 CN 115025712 A, 授权公告日 2019-11-02.
发明人高志强,黄志刚,钱学锋. "A Process for Preparing High-Purity 2-tert-butyl 8-ethyl 7-oxo-5-oxa-2-azaspiro[3.4]octane-2,8-dicarboxylate" [P]. 中国发明专利, 专利号 CN 117128468 A, 授权公告日 2020-01-14.
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