You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[4-[(5,7-diethyl-2-oxo-3,4-dihydro-1,6-naphthyridin-1-yl)methyl]phenoxy]-2-phenylacetic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H28N2O4
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