You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named N-(1,1-dioxothiolan-3-yl)-2-[ethyl(5,6,7,8-tetrahydro-[1]benzothiolo[2,3-d]pyrimidin-4-yl)amino]acetamide by IUPAC nomenclature, provide its molecular formula.
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C18H24N4O3S2
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