You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[3-[[5-fluoro-2-[[6-(methylamino)pyridin-3-yl]amino]pyrimidin-4-yl]amino]phenyl]prop-2-enamide The above is the IUPAC name of a molecule. Write its molecular formula.
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C19H18FN7O
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