1	7P2	2-[(2-carboxyphenyl)amino]-5-(4-phosphonobutoxy)benzoic acid	1.000
2	7P3	2-[(2-carboxyphenyl)amino]-5-[(5-phosphonopentyl)oxy]benzoic acid	0.727
3	7P1	2-[(2-carboxyphenyl)amino]-5-(3-phosphonopropoxy)benzoic acid	0.719