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-[3-(benzenesulfonamido)piperidin-1-yl]-N-(6-fluoro-1,3-benzothiazol-2-yl)acetamide by IUPAC nomenclature, provide its molecular formula.
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C20H21FN4O3S2
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