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 (5-bromofuran-2-yl)-[4-(5-nitropyridin-2-yl)piperazin-1-yl]methanone is given. What is its corresponding molecular formula?
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C14H13BrN4O4
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