Uridine, 5-[[3',6'-bis(acetyloxy)-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-6-yl]ethynyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-

Uridine, 5-[[3',6'-bis(acetyloxy)-3-oxospiro[isobenzofuran-1(3H),9'-[9H]xanthen]-5-yl]ethynyl]-5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-

2'-Deoxy-3-methyl-3',5'-di-O-methyluridine

Uridine, 5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-5-ethynyl-, 3'-(hydrogen butanedioate)

Uridine, 5'-O-[bis(4-methoxyphenyl)phenylmethyl]-2'-deoxy-5-ethynyl-, 3'-(4-oxopentanoate)

Cytidine, 3'-C-ethynyl-5'-O-[methoxy(4-nitrophenyl)methyl]-

Cytidine, 2',3'-O-[(S)-(3-aminophenyl)methylene]-3'-C-ethynyl-

Cytidine, 2',3'-O-[(S)-(4-aminophenyl)methylene]-3'-C-ethynyl-

Cytidine, 3'-C-ethynyl-2',3'-O-[(S)-(3-nitrophenyl)methylene]-

Cytidine, 3'-C-ethynyl-2',3'-O-[(S)-(4-nitrophenyl)methylene]-

2'-Deoxy-6-S-(1-methyl-4-nitro-1H-imidazol-5-yl)-6-thioguanosine

Cytidine, 5'-O-[ethoxy(4-nitrophenyl)methyl]-3'-C-ethynyl-

Cytidine, 3'-C-ethynyl-5'-O-[methoxy(3-nitrophenyl)methyl]-

Cytidine, 3'-C-ethynyl-5'-O-[(1-methylethoxy)(4-nitrophenyl)methyl]-

Cytidine, 5'-O-[(4-aminophenyl)methoxymethyl]-3'-C-ethynyl-

Cytidine, 5'-O-[ethoxy(3-nitrophenyl)methyl]-3'-C-ethynyl-

Cytidine, 5'-O-[(4-aminophenyl)ethoxymethyl]-3'-C-ethynyl-

Cytidine, 5'-O-[(4-aminophenyl)(1-methylethoxy)methyl]-3'-C-ethynyl-

Cytidine, N-benzoyl-3'-C-ethynyl-, 5'-benzoate

Cytidine, N-benzoyl-3'-C-ethynyl-2',3'-O-(1-methylethylidene)-, 5'-benzoate