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发明人郭海燕,郑宇鹏,罗永刚. "Method for the Synthesis of 2-(6-(Tert-butoxycarbonyl)-1-oxa-6-azaspiro[3.3]Heptan-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 116889229 B, 授权公告日 2019-04-20.
发明人赵玉洁,郑宇鹏,林芳. "A Process for Preparing High-Purity 2-(6-(Tert-butoxycarbonyl)-1-oxa-6-azaspiro[3.3]Heptan-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 111494221 A, 授权公告日 2019-11-22.
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