You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule N-[3-[3-cyclopropyl-7-[(4-fluoro-1,3-oxazol-2-yl)amino]-2-oxo-4H-pyrimido[4,5-d]pyrimidin-1-yl]phenyl]prop-2-enamide into molecular formula.
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C21H18FN7O3
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