D-Alanine, N-(hydroxyphenoxyphosphinyl)-, 1-methylethyl ester, 5′-ester with 9-(3-deoxy-β-L-erythro-pentofuranosyl)-9H-purin-6-amine

5′-[(Aminosulfonyl)amino]-5′-deoxy-2′,3′-O-(1-methylethylidene)guanosine

5′-Amino-5′-deoxy-N-[(dimethylamino)methylene]-2′,3′-O-(1-methylethylidene)guanosine

5′-Azido-5′-deoxy-N-[(dimethylamino)methylene]-2′,3′-O-(1-methylethylidene)guanosine

3-[5-O-(Aminosulfonyl)-2,3-O-(1-methylethylidene)-β-D-ribofuranosyl]-3H-imidazo[2,1-i]purine

Guanosine, 2′,3′-O-(1-methylethylidene)-, 5′-sulfamate

3-[5-O-[[[3-(1H-Indol-3-yl)-1-oxopropyl]amino]sulfonyl]-β-D-ribofuranosyl]-3H-imidazo[2,1-i]purine

5′-Deoxy-5′-[[[[3-(1H-indol-3-yl)-1-oxopropyl]amino]sulfonyl]amino]guanosine

Guanosine, 5′-[N-(1-oxobutyl)sulfamate]

Guanosine, 5′-[N-[3-(1H-indol-3-yl)-1-oxopropyl]sulfamate]

Thiazolium, 3-[(4-amino-2-methyl-5-pyrimidinyl)methyl]-5-[6-(5′-cytidylyloxy)-4,6-dihydroxy-4,6-dioxido-3,5-dioxa-4,6-diphosphahex-1-yl]-4-methyl-, inner salt

5′-Uridylic acid, anhydride with phosphorothioic acid (2:1)

2,4(1H,3H)-Pyrimidinedione, 1-[3-O-[(1,1-dimethylethyl)dimethylsilyl]-5-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-α-D-ribofuranosyl]-

2,4(1H,3H)-Pyrimidinedione, 1-[5-O-acetyl-3-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-α-D-ribofuranosyl]-5-(phenylseleno)-

2,4(1H,3H)-Pyrimidinedione, 1-[5-O-acetyl-3-O-[(1,1-dimethylethyl)diphenylsilyl]-2-Se-phenyl-2-seleno-α-D-arabinofuranosyl]-5-(phenylseleno)-

Uridine, 3′-O-[(1,1-dimethylethyl)diphenylsilyl]-2′-Se-phenyl-5-(phenylseleno)-2′-seleno-, 5′-acetate

Uridine, 5′-O-[(1,1-dimethylethyl)diphenylsilyl]-3′-O-[(2-methoxyethoxy)methyl]-2′-Se-phenyl-5-(phenylseleno)-2′-seleno-