5-(12-cholesteryloxycarbonylamino-N-(prop-2-ynyl)dodecanamido)-5'-O-(4,4'-dimethoxytrityl)-2'-deoxyuridine-3'-O-(2-cyanoethyl-N,N-diisopropyl)phosphoramidite
5-(12-cholesteryloxycarbonylamino-n-(prop-2-ynyl)dodecanamido)-5'-o-(4,4'-dimethoxytrityl)-2'-deoxyuridine-3'-o-(2-cyanoethyl-n,n-diisopropyl)phosphoramidite