You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named (2S)-1-[4-(dimethylsulfamoyl)phenyl]sulfonyl-N-[(4-methoxyphenyl)methyl]pyrrolidine-2-carboxamide is given. What is its corresponding molecular formula?
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C21H27N3O6S2
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