You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[2-[4-(3-chlorophenyl)piperazin-1-yl]-2-oxoethoxy]-N-(4-methylphenyl)benzenesulfonamide into its molecular formula.
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C25H26ClN3O4S
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