GRPR and neoplasm: Carlucci et al. (2015) developed two novel Al18F-labeled BBN analogs, Al18F-NOTA-4,7-lanthionine-BBN and Al18F-NOTA-2,6-lanthionine-BBN, with good radiochemical yield (>95%) and specific activity (≥63 and ≥88 GBq/μmol) for GRPR-positive tumor imaging.