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system
Name the molecular formula for the molecule established as 5-[1-(5-chloro-2-methylphenyl)-5-oxopyrrolidine-3-carbonyl]-1,5,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),9,11,13-tetraen-2-one using the IUPAC nomenclature.
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C23H21ClN4O3
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