1 JM4 N~5~-{3-[(1-methylethyl)sulfanyl]propanimidoyl}-L-ornithine 1.000 2 JM8 N~5~-[(3-(ethylsulfanyl)propanimidoyl]-L-ornithine 0.941 3 LN5 N5-(1-iminopropyl)-L-ornithine 0.765 4 VIO N5-(1-imino-3-butenyl)-L-ornithine 0.722 5 ILO N5-iminoethyl-L-ornithine 0.706