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system
Name the molecular formula for the molecule established as (1S,2S,6S,7S,8S,12R)-10-(3-chloro-4-fluorophenyl)-5-(4-methoxyphenyl)-3-oxa-4,10-diazatetracyclo[5.5.1.02,6.08,12]tridec-4-ene-9,11-dione using the IUPAC nomenclature.
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C23H18ClFN2O4
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