You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named N-[4-(1,3-dioxoisoindol-2-yl)butyl]-N-(2-methoxyphenyl)thiophene-2-sulfonamide by IUPAC nomenclature, provide its molecular formula.
user
C23H22N2O5S2
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