发明人刘建华,孙丽萍,黄志刚. "Method for the Synthesis of 8-Methyl-4-(4-nitrobenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113576502 B, 授权公告日 2018-11-22.
Jørgensen K, Rossi M, Björnsson E. "A Process for Preparing High-Purity 8-Methyl-4-(4-nitrobenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. European Patent, EP 3552820 A1, 2018-03-28.
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