You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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3-[(4-bromo-2,5-dimethylpyrazol-3-yl)methyl]-7-methylthieno[3,2-d]pyrimidin-4-one is the IUPAC name of a molecule. Please give its molecular formula.
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C13H13BrN4OS
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