发明人王建平,郑宇鹏,胡光. "Method for the Synthesis of 2-(2-Methyl-1-oxa-4-azaspiro[4.4]Nonane-4-carbonyl)cyclopropane-1-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113336961 A, 授权公告日 2024-07-08.
发明人杨光,钱学锋,马晓峰. "A Process for Preparing High-Purity 2-(2-Methyl-1-oxa-4-azaspiro[4.4]Nonane-4-carbonyl)cyclopropane-1-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111035177 B, 授权公告日 2018-06-04.
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