You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
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Convert the IUPAC name of a molecule (2R,4aS,5R,10bS)-9-bromo-7-fluoro-5-phenyl-2-(piperazin-1-ylmethyl)-3,4,4a,5,6,10b-hexahydro-2H-pyrano[3,2-c]quinoline into molecular formula.
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C23H27BrFN3O
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