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 N-(2-bromophenyl)-2-[4-(2-oxo-2-piperidin-1-ylethyl)piperazin-1-yl]acetamide is given. What is its corresponding molecular formula?
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C19H27BrN4O2
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