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-[(4-fluorophenyl)methyl]-5-hydroxy-2-(3-methoxyphenyl)-N-methyl-6-oxo-1H-pyrimidine-4-carboxamide into molecular formula.
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C20H18FN3O4
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