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 5-(2,3-dihydroindole-1-carbonyl)-N-[[(2S)-oxolan-2-yl]methyl]furan-2-sulfonamide is given. What is its corresponding molecular formula?
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C18H20N2O5S
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