You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named [(2Z)-7-methyl-2-[(1-methylindol-3-yl)methylidene]-3-oxo-1-benzofuran-6-yl] 5-bromo-1-benzofuran-2-carboxylate by IUPAC nomenclature, provide its molecular formula.
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C28H18BrNO5
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