HDAC6-IN-37 (compound W5) is an inhibitor of HDAC6 and has neuroprotective effects. HDAC6-IN-37 can restore the morphology of hippocampal neurons, reduce the expression of Aβ, Tau, and p-Tau proteins in the hippocampus of AD rats, and inhibit the formation of senile plaques and neurofibrillary tangles. Thus, HDAC6-IN-37 improves the Aβ/Cu 2+ -induced AD model in rats, regulates oxidative stress status, and balances neurotransmitter disorders in brain tissue.