You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-fluoro-N-[1-[[5-(furan-2-yl)-1,2-oxazol-3-yl]methyl]piperidin-4-yl]benzenesulfonamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H20FN3O4S
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