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 4-bromo-2-chloro-N-[3-(2,3-dihydro-1,4-benzodioxin-6-ylamino)quinoxalin-2-yl]benzenesulfonamide is given. What is its corresponding molecular formula?
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C22H16BrClN4O4S
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