You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2,4-dichloro-5-fluoro-N-[[6-methyl-2-(4-methylphenyl)imidazo[1,2-a]pyridin-3-yl]methyl]benzamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H18Cl2FN3O
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