You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 6-[5-[[(1S,2S,3R)-2-fluoro-8-azabicyclo[3.2.1]octan-3-yl]-methylamino]pyrazin-2-yl]-5-hydroxy-2-methylchromen-4-one by IUPAC nomenclature, provide its molecular formula.
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C22H23FN4O3
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