Uridine, 5′-deoxy-5′-[[N-[[[(1S)-2-(1,1-dimethylethoxy)-1-[(3-hydroxyphenyl)methyl]-2-oxoethyl]amino]carbonyl]-L-methionyl-3-[[(2R)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-3-(3-hydroxyphenyl)-1-oxopropyl]amino]-L-alanyl]amino]-

Uridine, 5′-deoxy-5′-[[N-[[[(1R)-2-(1,1-dimethylethoxy)-2-oxo-1-(phenylmethyl)ethyl]amino]carbonyl]-D-methionyl-3-[[(2R)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-3-phenylpropyl]amino]-D-alanyl]amino]-

Uridine, 2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-5′-[[D-methionyl-3-[[(2R)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-3-phenylpropyl]amino]-D-alanyl]amino]-

Uridine, 2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-5′-[[N-[(9H-fluoren-9-ylmethoxy)carbonyl]-D-methionyl-3-[[(2R)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-3-phenylpropyl]amino]-D-alanyl]amino]-

Uridine, 5′-deoxy-5′-[[D-methionyl-3-[[(2R)-2-[[(1,1-dimethylethoxy)carbonyl]amino]-1-oxo-3-phenylpropyl]amino]-D-alanyl]amino]-

Uridine, 2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-5′-[[N-[(1,1-dimethylethoxy)carbonyl]-D-phenylalanyl-(2R)-2-amino-β-alanyl]amino]-

Uridine, 5′-deoxy-5′-[[N-[(1,1-dimethylethoxy)carbonyl]-D-phenylalanyl-(2R)-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-β-alanyl]amino]-

Uridine, 5′-[[(2R)-3-(acetylamino)-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-1-oxopropyl]amino]-5′-deoxy-

Uridine, 5′-[[(2R)-3-(acetylamino)-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-1-oxopropyl]amino]-2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-

Uridine, 5′-[[(2R)-3-amino-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-1-oxopropyl]amino]-2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-

Uridine, 2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-5′-[[(2R)-3-[[(1,1-dimethylethoxy)carbonyl]amino]-2-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-1-oxopropyl]amino]-

Uridine, 2′,3′-O-[[4-(carboxymethoxy)phenyl]methylene]-5′-deoxy-5′-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-

Uridine, 5′-deoxy-5′-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-2′,3′-O-[[4-(2-methoxy-2-oxoethoxy)phenyl]methylene]-

Uridine, 5′-deoxy-5′-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-

Uridine, 5′-deoxy-5′-[[(9H-fluoren-9-ylmethoxy)carbonyl]amino]-2′,3′-O-(1-methylethylidene)-

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, mono(5-hydroxypentyl) ester

3′-Thymidylic acid, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, mono(4-hydroxybutyl) ester

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-(5-hydroxypentyl phosphonate)

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-(4-hydroxybutyl phosphonate)

Thymidine, 5′-O-[bis(4-methoxyphenyl)phenylmethyl]-, 3′-(3-hydroxypropyl phosphonate)