7-(2-Deoxy-β-D-erythro-pentofuranosyl)-5-(methylseleno)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-5-(phenylseleno)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

7-(2-Deoxy-β-D-erythro-pentofuranosyl)-5-(phenylthio)-7H-pyrrolo[2,3-d]pyrimidin-4-amine

2′-Deoxy-5-(methylseleno)cytidine

Bis[2-(α-D-glucopyranosylthio)ethyl] 3′-azido-3′-deoxy-5′-thymidylate

Cytidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P(O)-(2-cyanoethyl)-P-thiothymidylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

α-Cytidine, [P(S)]-3′-amino-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′,3′-trideoxy-P-[(2-methoxyethyl)amino]-α-adenylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

α-Cytidine, [P(R)]-3′-amino-N-benzoyl-5′-O-[bis(4-methoxyphenyl)phenylmethyl]-P,2′,3′-trideoxy-P-[(2-methoxyethyl)amino]-α-adenylyl-(3′→5′)-N-benzoyl-2′-deoxy-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

Adenosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-O-(2,3,5-tri-O-benzoyl-β-D-ribofuranosyl)-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

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

Guanosine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-[2-(4-nitrophenyl)ethyl]-N-[3-[(trifluoroacetyl)[4-[(trifluoroacetyl)[3-[(trifluoroacetyl)amino]propyl]amino]butyl]amino]propyl]-, 3′-[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]

Inosine, 2,2′′-iminobis[5′-O-[bis(4-methoxyphenyl)phenylmethyl]-2′-deoxy-6-O-(phenylmethyl)-, 3′,3′′′-bis[2-cyanoethyl N,N-bis(1-methylethyl)phosphoramidite]