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Name the molecular formula for the molecule established as 1-[(2R,4R)-6-bromo-2-cyclohexa-2,4-dien-1-yl-8-fluoro-1,2,3,4-tetrahydroquinolin-4-yl]pyrrolidin-2-one using the IUPAC nomenclature.
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C19H20BrFN2O
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