4-Fluoro-2-Methyl Isatin Anhydride;7-fluoro-1-methyl-3,1-benzoxazine-2,4-dione;5-fluoro-N-methylisatoic anhydride;N-methyl-4-fluoroisatoic anhydride;7-fluoro-1-methyl-1H-3,1-benzoxazine-2,4-dione;
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