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 N-[1-[(3,4-dichlorophenyl)methylsulfonyl]piperidin-4-yl]-N-methylmethanesulfonamide is given. What is its corresponding molecular formula?
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C14H20Cl2N2O4S2
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