GSK-3β inhibitor 15 (Compound 54) is a GSK-3β inhibitor (IC50: 3.4 nM). GSK-3β inhibitor 15 inhibits Aβ1-42-induced GSK-3β and tau protein phosphorylation. GSK-3β inhibitor 15 inhibits LPS-induced iNOS expression. GSK-3β inhibitor 15 has neuroprotective effects on Aβ1-42-induced neurotoxicity. GSK-3β inhibitor 15 can be used for research of Alzheimer’s disease (AD)[1].