Dyrk1A-IN-3 (Compound 8b), a highly selective dual-specificity tyrosine-regulated kinase 1A (DYRK1A) inhibitor, maintains high levels of DYRK1A binding affinity (IC50=76 nM). Dyrk1A-IN-3 can be used for the research of neurodegenerative disorders such as Alzheimer’s Disease, Huntington’s Disease, and Parkinson’s Disease.