发明人赵玉洁,张德明,陈志强. "Method for the Synthesis of 4-(3,5-Difluorobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114764946 B, 授权公告日 2020-06-03.
发明人钱学锋,孙丽萍,黄志刚. "A Process for Preparing High-Purity 4-(3,5-Difluorobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115791419 B, 授权公告日 2021-04-18.
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