You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 7-[(4-fluoro-2-methylphenyl)methyl]-4-hydroxy-1-methyl-2-oxo-N-propyl-1,5-naphthyridine-3-carboxamide into its molecular formula.
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C21H22FN3O3
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