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system
Name the molecular formula for the molecule established as (1R,2R,6R,7R)-4-[2-[4-(pyridine-3-carbonyl)piperazin-1-yl]ethyl]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione using the IUPAC nomenclature.
user
C21H24N4O3
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