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 5-acetyl-2-[[4-[4-(methylamino)-2-sulfophenyl]-3-sulfophenyl]carbamoyl]benzenesulfonic acid is given. What is its corresponding molecular formula?
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C22H20N2O11S3
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