You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named ethyl 6-fluoro-4-hydroxy-1-[(4-methoxyphenyl)methyl]-2-oxo-1,8-naphthyridine-3-carboxylate by IUPAC nomenclature, provide its molecular formula.
user
C19H17FN2O5
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