WLB-89462 (Compound 20c) is a selective σ2 receptor ligand ( K i : 13 nM). WLB-89462 has neuroprotective activity. WLB-89462 improves short-term memory impairment induced by Aβ peptide in rats. WLB-89462 has good ADMET profile (good solubility, no CYP inhibition, good metabolic stability, high permeability, brain penetration, and high oral exposure in rodents).