You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-[5-fluoro-2-oxo-4-(1-oxo-2,3-dihydroisoindol-5-yl)pyridin-1-yl]-N-hydroxy-2-methyl-2-methylsulfonylbutanamide into molecular formula.
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C19H20FN3O6S
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