发明人张德明,沈红梅,徐明华. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109699867 A, 授权公告日 2019-06-15.
发明人胡光,马晓峰,高志强. "Method for the Synthesis of 8-Ethyl-4-(naphthalene-2-carbonyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112267287 A, 授权公告日 2019-04-13.
发明人刘建华,韩伟,赵玉洁. "A Process for Preparing High-Purity 8-Ethyl-4-(naphthalene-2-carbonyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109451926 B, 授权公告日 2016-08-13.
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