β-D-ribo-Hept-5-enofuranuronothioic acid, 1,5,6-trideoxy-1-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)-2,3-bis-O-[(1,1-dimethylethyl)dimethylsilyl]-, S-phenyl ester, (5E)-

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-3-iodo-5-nitro-1H-indole

1-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-nitro-1H-indole

N-[3-[7-[5-O-[Bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2,2,2-trifluoroacetamide

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-1,7-dihydro-5-iodo-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-bromo-1,7-dihydro-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-chloro-1,7-dihydro-

4H-Pyrrolo[2,3-d]pyrimidin-4-one, 7-[5-O-[bis(4-methoxyphenyl)phenylmethyl]-3-O-[[bis(1-methylethyl)amino](2-cyanoethoxy)phosphino]-2-deoxy-β-D-erythro-pentofuranosyl]-5-fluoro-1,7-dihydro-

N-[3-[7-(2-Deoxy-β-D-erythro-pentofuranosyl)-4,7-dihydro-4-oxo-3H-pyrrolo[2,3-d]pyrimidin-5-yl]-2-propyn-1-yl]-2,2,2-trifluoroacetamide

Guanosine, 5′-O-[(1,1-dimethylethyl)dimethylsilyl]-8-ethenyl-2′,3′-O-(1-methylethylidene)-N-4-pentenyl-

Guanosine, 8-bromo-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′,3′-O-(1-methylethylidene)-N-4-pentenyl-

8-Bromo-5′-O-[(1,1-dimethylethyl)dimethylsilyl]-2′,3′-O-(1-methylethylidene)guanosine

(4R,5R,6S,7S)-6-Amino-12-(dimethylamino)-5,6,7,8-tetrahydro-5,8-dihydroxy-4,7-epoxy-4H-[1,3]diazocino[1,2,3-cd]purin-3-ium

β-Purine, 9-[3-deoxy-3-[p-methoxy-α-(3-phenyl-2-thioureido)hydrocinnamamido]-β-D-ribofuranosyl]-6-dimethylamino-

β-Purine, 9-[3-deoxy-3-(p-methoxy-α-p-nitrobenzamidohydrocinnamamido)-β-D-ribofuranosyl]-6-dimethylamino-

β-Purine, 9-(3-deoxy-3-formamido-β-D-ribofuranosyl)-6-dimethylamino-

β-Purine, 6-amino-9-α-D-arabinofuranosyl-2,8-dichloro-

β-Purine, 9-[3-deoxy-3-(p-methoxy-α-sulfanilamidohydrocinnamamido)-β-D-ribofuranosyl]-6-dimethylamino-

β-Purine, 9-(3-deoxy-3-phosphonoamino-β-D-ribofuranosyl)-6-dimethylamino-

β-Purine, 9-[3-deoxy-3-(2-phthalimidoacetamido)-β-D-ribofuranosyl]-6-dimethylamino-