1	5HY	[(4r)-2,5-dioxoimidazolidin-4-yl]acetic acid	1.000
2	IZC	2h-imidazol-4-ylacetic acid	0.818
3	O2U	[(3s)-1-hydroxy-2,5-dioxopyrrolidin-3-yl]acetic acid	0.769