1	AQQ	(2~{S})-5-azanyl-2-[[(2~{R})-1-oxidanyl-1-oxidanylidene-propan-2-yl]amino]pentanoic acid	1.000
2	AQK	(2~{S})-5-azanyl-2-(2-hydroxy-2-oxoethylamino)pentanoic acid	0.929
3	AOR	N~2~-acetyl-L-ornithine	0.733
4	6DB	Octopine	0.722
5	NLY	N-(4-aminobutyl)glycine	0.714