You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 4-(4-chloro-N-methylsulfonylanilino)-N-[2-(4-pyrrolidin-1-ylsulfonylphenoxy)ethyl]butanamide by IUPAC nomenclature, provide its molecular formula.
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C23H30ClN3O6S2
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