You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule N'-[5-(1,1-dioxo-1,2-thiazolidin-2-yl)-2-methylphenyl]-N-(4-propan-2-ylphenyl)oxamide into molecular formula.
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C21H25N3O4S
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