2'-deoxy-3'-O-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-Cytidine

This compound is a modified nucleoside protected with a phthalimide group, used as a building block in the synthesis of oligonucleotides. It features a cytosine base attached to a modified sugar ring, with the 5'-hydroxyl group masked by the phthalimide moiety for selective deprotection during solid-phase synthesis.