You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 1,3-dimethyl-5-[6-oxo-4-(1-phenylethyl)-7,8-dihydro-5H-naphthalen-2-yl]pyridin-2-one into its molecular formula.
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C25H25NO2
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