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发明人郭海燕,刘建华,林芳. "A Process for Preparing High-Purity 4-(4-(4-Methoxybenzylidene)-2,3-dioxopyrrolidin-1-yl)butanoic acid" [P]. 中国发明专利, 专利号 CN 109037399 B, 授权公告日 2020-05-23.
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