1 GV9 3-(acetylamino)thiophene-2-carboxylic acid 1.000 2 ZZ8 2-(acetylamino)benzoic acid 0.786 3 8BC 2-acetamido-6-fluorobenzoic acid 0.733 4 LGR 2-[acetyl(methyl)amino]benzoic acid 0.733