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

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

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

5′-Deoxy-5′-[[N-[[(1-methylethyl)amino]carbonyl]-L-alanyl-L-tryptophyl]amino]thymidine

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

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

5′-Deoxy-5′-[[N-[[(1-methylethyl)amino]carbonyl]-L-α-aspartyl-4-nitro-L-phenylalanyl]amino]thymidine

5′-Deoxy-5′-[[N-[[(1-methylethyl)amino]carbonyl]-L-alanyl-L-methionyl]amino]thymidine

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

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

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

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

5′-Deoxy-5′-[[N-[(propylamino)carbonyl]-L-tryptophyl-L-tryptophyl]amino]thymidine

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

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

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

5′-Deoxy-5′-[[N-[(propylamino)carbonyl]-L-isoleucyl-L-methionyl]amino]thymidine

5′-Deoxy-5′-[[N-[(propylamino)carbonyl]-L-tryptophyl-L-isoleucyl]amino]thymidine

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

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