1 JM6 N~5~-[4-(methylsulfanyl)butanimidoyl]-L-ornithine 1.000 2 VIO N5-(1-imino-3-butenyl)-L-ornithine 0.875 3 LN6 N~5~-[(1e)-pentanimidoyl]-L-ornithine 0.824 4 LN7 N~5~-[(1s)-1-aminopentyl]-L-ornithine 0.824 5 LN5 N5-(1-iminopropyl)-L-ornithine 0.812 6 ILO N5-iminoethyl-L-ornithine 0.750 7 4JK (S)-2-amino-5-(2-hydroxyacetimidamido)pentanoic acid 0.706 8 85J N-propyl-L-glutamine 0.706 9 FIO N~5~-[(1e)-2-fluoroethanimidoyl]-L-ornithine 0.706 10 VUR (S)-2-amino-5-(2-mercaptoacetimidamido)pentanoic acid 0.706 11 WT2 (S)-2-amino-5-(2-oxoacetimidamido)pentanoic acid 0.706