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-[2-(4-fluorophenyl)-2-hydroxy-3,5,6,7,8,9-hexahydroimidazo[1,2-a]azepin-4-ium-1-yl]-2-phenyl-4H-pyrazol-3-one;bromide is given. What is its corresponding molecular formula?
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C23H24BrFN4O2
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