104885-01-0
ethyl α-(ethoxymethylene)-2,3,4,5-tetrafluoro-6-nitro-β-oxobenzenepropanoate
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111542-93-9
司氟沙星
103772-11-8
2-nitro-3,4,5,6-tetrafluoro-β-oxobenzenepropanoic acid,ethyl ester