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Name the molecular formula for the molecule established as [(6R)-6-(5-bromo-2-fluorophenyl)-5-fluoro-4,4-dihydroxy-6-methyl-4lambda4-thia-7-azaspiro[2.5]oct-7-en-8-yl]carbamic acid using the IUPAC nomenclature.
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C14H15BrF2N2O4S
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