This compound is, by far, the most effective inhibitor of CDK5/p25 (IC50 = 160 nM [17]), as shown by numerous studies using this compound as a potential drug against cancer, neurodegenerative or viral diseases, inflammation, polycystic kidney disease (PKD) and glomerulonephritis (Table 2) [18,19,20,21,22]. This evidence concerns the gene CDK5 and cancer.