4-氧代-4H-1-苯并吡喃-2-甲酸乙酯;
ethyl 4-oxochromen-2-carboxylate;4-Oxo-4H-chromen-2-carbonsaeure-aethylester;4-oxo-4H-chromene-2-carboxylic acid ethyl ester;Ethyl 4-oxo-4H-1-benzopyran-2-carboxylate;ethyl 4-oxo-4H-chromene-2-carboxylate;
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