WLB-89462 (Compound 20c) is a selective σ2 receptor ligand with a K i of 13 nM, exhibiting neuroprotective properties and the ability to ameliorate Aβ peptide-induced short-term memory impairment in rats. It possesses a favorable ADMET profile characterized by good solubility, absence of CYP inhibition, robust metabolic stability, high permeability, effective brain penetration, and substantial oral exposure in rodent models [1].