You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-(3,4-difluorophenyl)-5-(3-methyl-1,2-oxazol-5-yl)-2-propan-2-ylbenzenesulfonamide into molecular formula.
user
C19H18F2N2O3S
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