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-(4-bromo-2,6-dichloro-3-methoxy-5-methylphenyl)-4-[4-(4-ethylpiperazin-1-yl)-2-methoxyanilino]thieno[3,2-d]pyrimidine-7-carboxamide by IUPAC nomenclature, provide its molecular formula.
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C28H29BrCl2N6O3S
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