You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named 7-[[[3-(4-fluoro-3-methylphenyl)-2-hydroxypropyl]amino]methyl]-1H-1,8-naphthyridin-2-one by IUPAC nomenclature, provide its molecular formula.
user
C19H20FN3O2
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