You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N-[(2R)-1-(butylamino)-1-oxopropan-2-yl]-N-[(2,4-dichlorophenyl)methyl]-4-(4-methoxy-N-methylsulfonylanilino)butanamide into molecular formula.
user
C26H35Cl2N3O5S
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