发明人孙丽萍,王建平,刘建华. "Method for the Synthesis of 4-(4-tert-Butylbenzoyl)-8-methyl-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109925221 B, 授权公告日 2019-09-24.
发明人赵玉洁,徐明华,罗永刚. "A Process for Preparing High-Purity 4-(4-tert-Butylbenzoyl)-8-methyl-1-oxa-4-azaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113593873 B, 授权公告日 2022-02-28.
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