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 2-chloro-4-[methyl(methylsulfonyl)amino]-N-[2-[(4-methylphenyl)methylsulfanyl]ethyl]benzamide is given. What is its corresponding molecular formula?
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C19H23ClN2O3S2
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