Precursors were synthesized similar as described above followed by palladium-catalyzed stannylation (SI). Cu-mediated 18 F-fluorination succeeded using our previously reported method (Figure , SI Section S7). If necessary, protecting groups were removed quantitatively in a second step using acidic conditions. After purification, all products were formulated in ethanol / phosphate buffer (pH 7.4). Radiochemical yields (RCYs) were obtained in the order of 9-19% in a synthesis time of approx. 90 min. Molar activities (Am) were in the order of 70-210 GBq/µmol, radiochemical purities (RCP) >92%. Stability studies revealed that all compounds -except for 5 and 6 -were stable for at least 2 hours. Because of the low stability, possibly caused by radiolysis, 5 and 6 were not evaluated in further experiments.