2-(2-Deoxy-β-D-erythro-pentofuranosyl)-5-methylpyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,5H)-dione

2'-Deoxy-5-iodo-3-methylcytidine

2-(2-Deoxy-β-D-erythro-pentofuranosyl)-10-(methylsulfonyl)pyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,4H)-dione

2'-Deoxy-5-(1H-indol-2-yl)-N-methylcytidine

2-(2-Deoxy-β-D-erythro-pentofuranosyl)-10-(dimethylamino)pyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,4H)-dione

2-(2-Deoxy-β-D-erythro-pentofuranosyl)-10-fluoropyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,4H)-dione

2-(2-Deoxy-β-D-erythro-pentofuranosyl)-10-(methylthio)pyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,4H)-dione

2-(2-Deoxy-β-D-erythro-pentofuranosyl)-2,3,4,6-tetrahydro-3,6-dioxopyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-10-carbonitrile

2-(2-Deoxy-β-D-erythro-pentofuranosyl)-10-methoxypyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,4H)-dione

[1,2,5]Oxadiazolo[3,4-d]pyrimidine-5,7(4H,6H)-dione, 6-methyl-4-(2,3,5-tri-O-acetyl-β-D-xylofuranosyl)-, 1-oxide

[1,2,5]Oxadiazolo[3,4-d]pyrimidine-5,7(4H,6H)-dione, 4-(2,3,5-tri-O-acetyl-β-D-xylofuranosyl)-, 1-oxide

2-(2-Deoxy-β-D-erythro-pentofuranosyl)pyrimido[4′,5′:4,5]pyrimido[1,6-a]indole-3,6(2H,4H)-dione

9-[2,3-Bis-O-(tetrahydro-2H-pyran-2-yl)-β-D-ribofuranosyl]-6-methyl-9H-purine

Guanylyl-(3′→5′)-uridylyl-(3′→5′)-cytidylyl-(3′→5′)-adenylyl-(3′→5′)-adenylyl-(3′→5′)-adenosine

Guanylyl-(3′→5′)-uridylyl-(3′→5′)-guanylyl-(3′→5′)-adenylyl-(3′→5′)-adenylyl-(3′→5′)-adenosine

Thymidine, N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)-5-methylcytidylylimino(1-oxo-1,2-ethanediyl)-(3′→5′)-5′-thio-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)-5-methylcytidylylimino(1-oxo-1,2-ethanediyl)-(3′→5′)-5′-thiothymidine

N-Benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-3′-de(phosphinicooxy)-5-methylcytidylylimino(1-oxo-1,2-ethanediyl)-(3′→5′)-3′-O-[(1,1-dimethylethyl)dimethylsilyl]-5′-thiothymidine

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)thymidylylimino(1-oxo-1,2-ethanediyl)-(3′→5′)-5′-thio-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

5′-O-[Bis(4-methoxyphenyl)phenylmethyl]-3′-de(phosphinicooxy)thymidylylimino(1-oxo-1,2-ethanediyl)-(3′→5′)-5′-thiothymidine