1 AQK (2~{S})-5-azanyl-2-(2-hydroxy-2-oxoethylamino)pentanoic acid 1.000 2 AQQ (2~{S})-5-azanyl-2-[[(2~{R})-1-oxidanyl-1-oxidanylidene-propan-2-yl]amino]pentanoic acid 0.929 3 AOR N~2~-acetyl-L-ornithine 0.786 4 NLY N-(4-aminobutyl)glycine 0.769 5 NLQ N~2~-acetyl-L-glutamine 0.733 6 AN0 N-acetyl-L-norvaline 0.714 7 GNC N~2~-methyl-L-glutamine 0.714 8 HJV N~2~-methyl-D-glutamine 0.714 9 I78 (2~{R})-2-(carboxycarbonylamino)propanoic acid 0.714