You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-[5-[3-[7-(3-fluoro-5-hydroxyphenyl)-3H-imidazo[4,5-c]pyridin-2-yl]-1H-pyrazolo[4,3-b]pyridin-5-yl]pyridin-3-yl]pentanamide by IUPAC nomenclature, provide its molecular formula.
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C28H23FN8O2
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