Carbamic acid, diphenyl-, 7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-4-[(1,1-dimethylethyl)amino]-7H-pyrrolo[2,3-d]pyrimidin-2-yl ester

Carbamic acid, diphenyl-, 7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-3-O-(hydroxyphosphinyl)-β-D-erythro-pentofuranosyl]-4-[(1,1-dimethylethyl)amino]-7H-pyrrolo[2,3-d]pyrimidin-2-yl ester

5-(2-Benzofuranyl)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]uridine

Uridine, 5-(2-benzofuranyl)-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-[(1,1-dimethylethyl)dimethylsilyl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]