You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[7-(3-fluoro-5-methylphenyl)-1H-imidazo[4,5-b]pyridin-2-yl]-5-(4-methylpyridin-3-yl)-1H-pyrazolo[4,3-b]pyridine The above is the IUPAC name of a molecule. Write its molecular formula.
user
C25H18FN7
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