N-Acetyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O,4′-C-methylene-3′-O-[(1R,3R,3aS)-tetrahydro-3-phenyl-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]cytidine

N-Acetyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O,4′-C-methylene-3′-O-[(1S,3S,3aR)-tetrahydro-3-phenyl-1H,3H-pyrrolo[1,2-c][1,3,2]oxazaphosphol-1-yl]cytidine

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-4,5-dihydro-3-iodo-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-2-methylpropanamide

N-[1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-2-deoxy-β-D-erythro-pentofuranosyl]-3-bromo-4,5-dihydro-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-2-methylpropanamide

Cytidine, 2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxy-

Cytidine, 7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxy-

Cytidine, 2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-7-iodo-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxy-

Cytidine, 7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-7-bromo-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxy-

Cytidine, 2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxycytidylyl-(3′→5′)-2′-deoxy-8-aza-7-deazaguanylyl-(3′→5′)-2′-deoxy-

N-[1-(2-Deoxy-β-D-erythro-pentofuranosyl)-4,5-dihydro-3-iodo-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-2-methylpropanamide

N-[3-Bromo-1-(2-deoxy-β-D-erythro-pentofuranosyl)-4,5-dihydro-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-6-yl]-2-methylpropanamide

3′-Thymidylic acid, 5-amino-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-6-[1-[3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,2-dihydro-2-oxo-4-pyrimidinyl]-5,6-dihydro-, mono(2-cyanoethyl) ester, intramol. 3′,5′′′-ester, (5R,6R)-