You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 1-[5-(benzotriazole-1-carbonyl)-4-(4-bromophenyl)-2-methyl-1H-pyrrol-3-yl]ethanone by IUPAC nomenclature, provide its molecular formula.
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C40H30Br2N8O4
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