发明人徐明华,郭海燕,沈红梅. "Method for the Synthesis of 4,4-Dimethoxy-2-[(3-nitrophenyl)methylene]-3-oxo-butanoic Acid Methyl Ester
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Methyl-4,4-dimethoxy-2-(3-nitrobenzylidene)-acetoacetate" [P]. 中国发明专利, 专利号 CN 113214683 B, 授权公告日 2015-08-21.
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