You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2R,3R)-3-[[3,5-difluoro-6-(5-fluoro-2H-pyrazolo[3,4-b]pyridin-3-yl)pyridin-2-yl]amino]bicyclo[2.2.2]octane-2-carboxylic acid by IUPAC nomenclature, provide its molecular formula.
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C20H18F3N5O2
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