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 1-benzylsulfonyl-N-[3-chloro-2-(difluoromethylsulfanyl)phenyl]piperidine-4-carboxamide is given. What is its corresponding molecular formula?
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C20H21ClF2N2O3S2
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