You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(4-chlorophenyl)-7,7-dimethyl-N-(4-methylphenyl)-2,5-dioxo-6,8-dihydroquinoline-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H23ClN2O3
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