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 3-phenyl-N-[[2-(propan-2-ylsulfamoylmethyl)phenyl]methyl]pyrazolidine-4-carboxamide is given. What is its corresponding molecular formula?
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C21H28N4O3S
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