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Name the molecular formula for the molecule established as [7-[(4aS,7aR)-3,4,4a,5,7,7a-hexahydro-2H-pyrrolo[3,4-b][1,4]oxazin-6-yl]-6-fluoro-1-[(1R,2R)-2-fluorocyclopropyl]-4-oxo-1,8-naphthyridin-3-yl] hydrogen carbonate using the IUPAC nomenclature.
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C18H18F2N4O5
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