You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 4-fluoro-3-[4-(1H-indol-3-yl)piperidine-1-carbonyl]-N-methylbenzenesulfonamide is given. What is its corresponding molecular formula?
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C21H22FN3O3S
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