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system
Name the molecular formula for the molecule established as [2-[[4-(difluoromethoxy)benzoyl]amino]-2-oxoethyl] 2-(1,3-dioxo-3a,4,5,6,7,7a-hexahydroisoindol-2-yl)propanoate using the IUPAC nomenclature.
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C21H22F2N2O7
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