You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named (2R)-1-(4-chlorophenyl)sulfonyl-N-[(1R)-1-(5,6,7,8-tetrahydronaphthalen-2-yl)ethyl]pyrrolidine-2-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C23H27ClN2O3S
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