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-[2-(2-chlorophenyl)-2-morpholin-4-ylethyl]-2,3-dihydro-1H-indene-5-sulfonamide is given. What is its corresponding molecular formula?
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C21H25ClN2O3S
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