1 GWM (4-methylphenyl) dihydrogen phosphate 1.000 2 88L (4-ethylphenyl) dihydrogen phosphate 0.923 3 HPS Phenyl dihydrogen phosphate 0.917 4 4OJ (2-methylphenyl) dihydrogen phosphate 0.846 5 262 2-formylphenyl dihydrogen phosphate 0.786 6 FW6 (3-ethylphenyl) dihydrogen phosphate 0.786 7 QMP Cyclohexyl methylphosphonate 0.769 8 299 2,6-diformyl-4-methylphenyl dihydrogen phosphate 0.750 9 4NP 4-nitrophenyl phosphate 0.733 10 PTR O-phosphotyrosine 0.706