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system
Name the molecular formula for the molecule established as 7-ethyl-2-fluoro-4-oxo-1a-[4-[(2-oxo-5,6,7,8-tetrahydro-1H-quinolin-4-yl)methyl]piperazin-1-yl]-1,3a,7a,7b-tetrahydrocyclopropa[h]quinoline-5-carboxylic acid using the IUPAC nomenclature.
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C27H33FN4O4
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