You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule (E)-N-[2-[(1,1-dioxothiolan-3-yl)amino]-2-oxoethyl]-2-methyl-3-phenylprop-2-enamide into molecular formula.
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C16H20N2O4S
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