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-(1,1-dioxothiolan-3-yl)-5-methylpyrazol-3-yl]-5-oxo-1-(2-phenylethyl)pyrrolidine-3-carboxamide is given. What is its corresponding molecular formula?
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C21H26N4O4S
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