MultitargetADinhibitor-1 is a reversible and selective inhibitor of butyrylcholinesterase (BuChE) with IC50 values of 7.22 μM and 1.55 μM for human BuChE (hBuChE) and equine serum BuChE (eqBuChE), respectively. Additionally, it exhibits inhibitory activity towards β-secretase (IC50 value of 41.60 μM), amyloid β aggregation (IC50 value of 3.09 μM), and tau aggregation. As a diphenylpropylamine derivative, MultitargetADinhibitor-1 holds promise for research pertaining to the multifunctional, disease-modifying treatment of Alzheimer's disease.