You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Name the molecular formula for the molecule established as 2-[(4-bromophenyl)methyl-[2-[methyl-(4-methylphenyl)sulfonylamino]acetyl]amino]-N-methylpropanamide using the IUPAC nomenclature.
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C21H26BrN3O4S
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