发明人冯建国,周伟,胡光. "Method for the Synthesis of Tert-butyl 5,5-difluoro-7-oxa-2-azaspiro[3.5]Nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 112424299 B, 授权公告日 2020-09-23.
发明人高志强,沈红梅,郑宇鹏. "A Process for Preparing High-Purity Tert-butyl 5,5-difluoro-7-oxa-2-azaspiro[3.5]Nonane-2-carboxylate" [P]. 中国发明专利, 专利号 CN 116720788 A, 授权公告日 2020-06-28.
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