Notes: WLB-89462 is a ligand of sigma intracellular receptor 2 (σ2 receptor).{67823} It selectively binds to the σ2 receptor (Ki = 13 nM) over the σ1 receptor (Ki = 1,777 nM). WLB-89462 (10 µM) prevents decreases in the number of dopaminergic neurons in an in vitro model of neurodegeneration using primary rat neurons and induced by the neurotoxin N-methyl-4-phenylpyridinium (MPP+). In vivo, WLB-89462 (10 mg/kg) improves short-term memory in the T-maze in rats in a model of Alzheimer’s disease induced by hippocampal amyloid-β peptide injection.