1-[1-[2-Deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-7-ethyl-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-7-(phenylmethyl)-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-(2-Deoxy-β-D-erythro-pentofuranosyl)-7-(phenylmethyl)-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-[2-Deoxy-3,5-bis-O-(4-methylbenzoyl)-β-D-erythro-pentofuranosyl]-7-(phenylmethyl)-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[(R)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-7-ethyl-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[(S)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-7-ethyl-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[(R)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-7-(phenylmethyl)-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

1-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[(S)-[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-7-(phenylmethyl)-1H-imidazo[4,5-c]pyridin-4-yl]-3,3,4,4-tetramethyl-2,5-pyrrolidinedione

Cytidine, guanylyl-(3′→5′)-cytidylyl-(3′→5′)-adenylyl-(3′→5′)-guanylyl-(3′→5′)-uridylyl-(3′→5′)-guanylyl-(3′→5′)-guanylyl-(3′→5′)-

Thymidylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyguanylyl-(3′→5′)-2′-deoxyadenosine