5′-[[N-[[(4-Cyanophenyl)amino]carbonyl]-L-tryptophyl-L-methionyl]amino]-5′-deoxythymidine

5′-[[N-[[(4-Cyanophenyl)amino]carbonyl]-L-isoleucyl-L-tyrosyl]amino]-5′-deoxythymidine

5′-[[N-[[(4-Cyanophenyl)amino]carbonyl]-4-nitro-L-phenylalanyl-4-nitro-L-phenylalanyl]amino]-5′-deoxythymidine

5′-Deoxy-5′-[[N-[(phenylamino)carbonyl]-L-tryptophyl-4-nitro-L-phenylalanyl]amino]thymidine

5′-Deoxy-5′-[[N-[(phenylamino)carbonyl]-L-tyrosyl-β-alanyl]amino]thymidine

5′-Deoxy-5′-[[4-nitro-N-[(phenylamino)carbonyl]-L-phenylalanyl-L-alanyl]amino]thymidine

5′-Deoxy-5′-[[N-[(phenylamino)carbonyl]-β-alanyl-L-alanyl]amino]thymidine

5′-Deoxy-5′-[[N-[(phenylamino)carbonyl]-L-methionyl-4-nitro-L-phenylalanyl]amino]thymidine

5′-Deoxy-5′-[[N2-[[(phenylmethyl)amino]carbonyl]-L-asparaginyl-L-lysyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(phenylmethyl)amino]carbonyl]-L-tyrosyl-L-tyrosyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(phenylmethyl)amino]carbonyl]-L-tyrosyl-L-isoleucyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(phenylmethyl)amino]carbonyl]-β-alanyl-4-nitro-L-phenylalanyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(phenylmethyl)amino]carbonyl]-L-isoleucyl-β-alanyl]amino]thymidine

5′-Deoxy-5′-[[N2-[[(1-methylethyl)amino]carbonyl]-L-asparaginyl-L-α-aspartyl]amino]thymidine

5′-Deoxy-5′-[[N2-[[(1-methylethyl)amino]carbonyl]-L-lysyl-β-alanyl]amino]thymidine

5′-Deoxy-5′-[[N2-[[(1-methylethyl)amino]carbonyl]-L-lysyl-4-nitro-L-phenylalanyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(1-methylethyl)amino]carbonyl]-L-isoleucyl-L-α-aspartyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(1-methylethyl)amino]carbonyl]-L-tyrosyl-L-lysyl]amino]thymidine

5′-Deoxy-5′-[[N-[(propylamino)carbonyl]-L-alanyl-L-α-aspartyl]amino]thymidine

5′-Deoxy-5′-[[N-[(propylamino)carbonyl]-β-alanyl-β-alanyl]amino]thymidine