Fig. 1From: GMP-compliant fully automated radiosynthesis of [18F]FEPPA for PET/MRI imaging of regional brain TSPO expressiona The retention time (Rt) of [18F]FEPPA in semi-preparative HPLC analysis was 13.07Â min. b The retention time (Rt) of [18F]FEPPA in HPLC analysis was 6.8Â min. c The retention time (Rt) of authentic FEPPA in HPLC analysis was 6.6Â minBack to article page