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 dimethyl 5-[1-(1-ethyl-3-methylpyrazol-4-yl)ethylcarbamothioylamino]-3-methylthiophene-2,4-dicarboxylate into molecular formula.
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C18H24N4O4S2
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