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-[(2S,3S)-4-(4-chlorophenyl)-3-(3-cyanophenyl)butan-2-yl]-3,5-difluorobenzenesulfonamide is given. What is its corresponding molecular formula?
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C23H19ClF2N2O2S
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