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system
Name the molecular formula for the molecule established as (2R)-2-[[2-(4-bromo-3-methyl-N-methylsulfonylanilino)acetyl]-[(4-chlorophenyl)methyl]amino]-N-[(2S)-butan-2-yl]propanamide using the IUPAC nomenclature.
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C24H31BrClN3O4S
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