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发明人马晓峰,郭海燕,陈志强. "Method for the Synthesis of 4-{[1,1'-Biphenyl]-4-carbonyl}-8-ethyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112677815 B, 授权公告日 2016-08-16.
发明人高志强,王建平,孙丽萍. "A Process for Preparing High-Purity 4-{[1,1'-Biphenyl]-4-carbonyl}-8-ethyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112623867 B, 授权公告日 2025-04-22.
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