You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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For the molecule named 3-[(2-benzyl-4-hydroxypiperidin-4-yl)-(3-chlorophenyl)methyl]-6-bromo-1H-quinolin-2-one by IUPAC nomenclature, provide its molecular formula.
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C28H26BrClN2O2
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