Representative time-activity curves of microPET studies for [18F]10a, [18F]17a, [18F]17b and (±)-[18F]24 in brains of nonhuman primates. The curves indicated that three radiotracers [18F]10a, [18F]17a and[18F]17b achieved the max SUV value fast, at 4–6 min post injection. [18F]10a had the highest initial brain uptake while [18F]17b exhibited relatively slow washout kinetics. (±)-[18F]24 displayed the lowest initial uptake in the brain, indicating it has no capability in penetrating the BBB of nonhuman primate.