You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
6-[(4-methoxyphenyl)methyl]-2-methyl-5-oxo-N-[[(2R)-oxolan-2-yl]methyl]-1,6-naphthyridine-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C23H25N3O4
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