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system
Name the molecular formula for the molecule established as (2R)-N-(2-chloro-5-nitrophenyl)-2-[[5-[(2-fluorophenoxy)methyl]-4-prop-2-enyl-1,2,4-triazol-3-yl]sulfanyl]propanamide using the IUPAC nomenclature.
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C21H19ClFN5O4S
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