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-chloro-N-(6-methoxy-1,3-dimethyl-2-oxobenzimidazol-5-yl)benzenesulfonamide is given. What is its corresponding molecular formula?
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C16H16ClN3O4S
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