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发明人王建平,冯建国,何建平. "Method for the Synthesis of 4-(2-Chlorobenzoyl)-8-methyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117428652 B, 授权公告日 2015-10-07.
发明人沈红梅,刘建华,陈志强. "A Process for Preparing High-Purity 4-(2-Chlorobenzoyl)-8-methyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117538765 B, 授权公告日 2015-02-13.
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