N6-(3-methylbut-2-en-1-yl)-5′-O-DMTr-2′-O-TBDMS-A(Ac)-3′-CE-Phosphoramidite

N6-(3-methylbut-2-en-1-yl)-5'-O-(4, 4'-dimethoxytrityl)-2'-O-(t-butyl-dimethylsilyl)-adenosine(acetyl)-3'-O-[(2-cyanoethyl)-N,N-diisopropyl] Phosphoramidite