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system
Name the molecular formula for the molecule established as 3-[[2-(2,6-dioxopiperidin-3-yl)-1-oxo-3H-isoindol-5-yl]oxy]-N-[(3S,4R)-3-hydroxyoxan-4-yl]propanamide using the IUPAC nomenclature.
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C21H25N3O7
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