You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-methyl-N-[4-methyl-3-[(5-pyridin-4-yl-1,3-oxazol-2-yl)amino]phenyl]-1-phenylmethanesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
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C23H22N4O3S
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