You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (E)-N-[1-(3-chlorophenyl)ethyl]-3-[4-(1,1-dioxo-1,2-thiazolidin-2-yl)phenyl]prop-2-enamide into molecular formula.
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C20H21ClN2O3S
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