发明人赵玉洁,林芳,唐晓军. "Method for the Synthesis of 8-Methyl-4-(3,4,5-trimethoxybenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113711650 A, 授权公告日 2023-04-10.
发明人冯建国,刘建华,张德明. "A Process for Preparing High-Purity 8-Methyl-4-(3,4,5-trimethoxybenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114712529 B, 授权公告日 2019-09-10.
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