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system
Name the molecular formula for the molecule established as [2-oxo-2-(5-phenyl-3,4-dihydropyrazol-2-yl)ethyl] 2-[(3aR,7aR)-1,3-dioxo-3a,4,5,6,7,7a-hexahydroisoindol-2-yl]acetate using the IUPAC nomenclature.
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C21H23N3O5
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