You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Under IUPAC nomenclature, a molecule named 2-[5-(4-bromophenyl)-4-oxothieno[2,3-d]pyrimidin-3-yl]-N-(2,3-dimethylphenyl)propanamide is given. What is its corresponding molecular formula?
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C23H20BrN3O2S
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