1 M9P Amino{[(4s,5s)-4-amino-6,6,6-trifluoro-5-hydroxyhexyl]amino}methaniminium 1.000 2 ARM Deoxy-methyl-arginine 0.800 3 OAR N-(4-amino-5-hydroxy-pentyl)-guanidine 0.733 4 RGL Arginal 0.733 5 0MG Amino{[(4s)-4-amino-5-carboxy-5-oxopentyl]amino}methaniminium 0.706