发明人唐晓军,孙丽萍,陈志强. "Method for the Synthesis of 8-Ethyl-4-(3-nitrobenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114947913 A, 授权公告日 2019-06-03.
发明人孙丽萍,沈红梅,唐晓军. "A Process for Preparing High-Purity 8-Ethyl-4-(3-nitrobenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109594508 B, 授权公告日 2020-03-06.
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