You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 2-[4-[(3-fluorophenyl)methyl]-6-methylpyridin-2-yl]-4-pyrrolidin-1-ylsulfonylmorpholine by IUPAC nomenclature, provide its molecular formula.
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C21H26FN3O3S
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