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Tacrine–Melatonin Hybrids as Multifunctional Agents for Alzheimer's Disease, with Cholinergic, Antioxidant, and Neuroprotective Properties

Tacrine–melatonin hybrids are potential multifunctional drugs for Alzheimer's disease that may simultaneously palliate intellectual deficits and protect the brain against both β‐amyloid peptide and oxidative stress. Molecular modeling studies show that they target both the catalytic active site (CAS) and the peripheral anionic site (PAS) of AChE. They are nontoxic and may be able to penetrate the CNS, according to in vitro PAMPA‐BBB assays.