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发明人郑宇鹏,刘建华,李文辉. "A Process for Preparing High-Purity 5-(4-Methylthiophen-3-yl)-1,2,4-oxadiazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 116298114 B, 授权公告日 2015-11-13.
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