1 4G5 4-[(2-amino-2-oxoethyl)(methyl)carbamoyl]-2-phenyl-1h-imidazole-5-carboxylic acid 1.000 2 4G8 4-[benzyl(carboxymethyl)carbamoyl]-2-phenyl-1h-imidazole-5-carboxylic acid 0.724