1	OUD	(3~{S})-3-azanyl-4-(carboxyamino)butanoic acid	1.000
2	D6O	(~{z})-4-formamido-4-oxidanylidene-but-2-enoic acid	0.750
3	URV	[(2~{S})-2-azanyl-3-methyl-butyl]carbamic acid	0.750
4	G2Z	[(2~{S})-2-azanylpropyl]carbamic acid	0.727