You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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N-[2-[5-(4-chlorophenyl)-3-(furan-2-yl)-3,4-dihydropyrazol-2-yl]-2-oxoethyl]-N-methylbenzenesulfonamide is the IUPAC name of a molecule. Please give its molecular formula.
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C22H20ClN3O4S
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