1 BEK 2,3,5,6-tetrafluoro-4-methoxy-benzamide 1.000 2 PFB 2,3,4,5,6-pentafluorobenzyl alcohol 0.750 3 8ZX 4-methoxybenzamide 0.733 4 QI8 2,3,5,6-tetrafluoro-N-hydroxybenzamide 0.706