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 tert-butyl N-[6-bromo-1-[2-(2-ethoxy-5-fluorophenyl)-2-oxoethyl]-5-methyl-2,4-dioxothieno[2,3-d]pyrimidin-3-yl]-N-methylcarbamate into molecular formula.
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C23H25BrFN3O6S
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