发明人黄志刚,孙丽萍,胡光. "Method for the Synthesis of 5-Methyl-6-oxa-5-azaspiro[3.4]octane-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116567755 B, 授权公告日 2022-06-17.
发明人郑宇鹏,马晓峰,赵玉洁. "A Process for Preparing High-Purity 5-Methyl-6-oxa-5-azaspiro[3.4]octane-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108758461 B, 授权公告日 2021-07-14.
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