You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-(4-fluorophenyl)-6-methyl-2-oxo-4-(4-propan-2-ylphenyl)-3,4-dihydro-1H-pyrimidine-5-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
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C21H22FN3O2
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