You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-fluoro-N-[3-[7-(1-methylpyrazol-4-yl)-3,4,6,7-tetrahydroimidazo[4,5-c]pyridin-5-yl]-3-oxopropyl]benzamide by IUPAC nomenclature, provide its molecular formula.
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C20H21FN6O2
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