1	4NG	[(3s,5s)-1,5-dihydroxy-2-oxopyrrolidin-3-yl]phosphonic acid	1.000
2	KVM	[(3s)-1-hydroxy-2,5-dioxopyrrolidin-3-yl]phosphonic acid	1.000
3	5TX	((3s,5s)-1,5-dihydroxy-3-methyl-2-oxopyrrolidin-3-yl)phosphonic acid	0.923
4	6BM	[(3s)-1-hydroxy-2-oxopiperidin-3-yl]phosphonic acid	0.714