1	60M	6-(phosphonomethyl)pyridine-2-carboxylic acid	1.000
2	60N	6-[(~{S})-oxidanyl(phosphono)methyl]pyridine-2-carboxylic acid	0.933
3	SYC	(pyridin-2-ylmethyl)phosphonic acid	0.786
4	CRB	[1r-(1alpha,3beta,4alpha,5beta)]-5-(phosphonomethyl)-1,3,4-trihydroxycyclohexane-1-carboxylic acid	0.722