You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 4-(4-chloro-N-methylsulfonylanilino)-N-[(2-fluorophenyl)methyl]-N-[1-(methylamino)-1-oxo-3-phenylpropan-2-yl]butanamide into molecular formula.
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C28H31ClFN3O4S
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