article reported the synthesis and bioevaluation of two [18F] labeled benzimidazole derivatives, 4-(5-(2-[18F] fluoro-4-nitrobenzamido)-1-methyl-1H-benzimidazol-2-yl) butanoic acid ([18F] FNBMBBA, [18F]a1) and 3-(2-fluoroethyl)-7-methyl-2-propyl-3H-benzimidazole-5-carboxylic acid ([18F] FEMPBBA, [18F]b1) for PET tumor imaging. The preparation [18F] FEMPBBA was completed in 1 h with overall radiochemical