KKR11 potently inhibited MAO-A and MAO-B activities, showed reversibility of MAO-A inhibition with high affinity, markedly inhibited PCa cell growth, changed LNCaP morphology, and slowed DU145 migration (Table 1, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8 and Figure 9). Here, MAOB is linked to posterior cortical atrophy.