You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[(3-bromophenyl)sulfonylamino]-N-[3-methoxy-4-(2-oxopyrrolidin-1-yl)phenyl]propanamide by IUPAC nomenclature, provide its molecular formula.
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C20H22BrN3O5S
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