Fig. 2From: Small peptide-based GLP-1R ligands: an approach to reduce the kidney uptake of radiolabeled GLP-1R-targeting agents?A HPLC chromatogram of purified lead peptide 1 (20–80% B in 15 min, Method A*, 1 mL/min, tR = 11.6 min), which was obtained in 95% chemical purity. B Corresponding mass spectrum of the HPLC-fraction collected at 11.6 min. *Method A: solvent A = water + 0.1% TFA, solvent B = acetonitrile + 2% water + 0.1% TFABack to article page