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system
Name the molecular formula for the molecule established as (2,4-difluorophenyl) (3S)-4-acetyl-7-[1-amino-3-(2-hydroxyethylamino)propan-2-yl]-3-methyl-2,3-dihydroquinoxaline-1-carboxylate using the IUPAC nomenclature.
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C23H28F2N4O4
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