PD 144418 displays potential antipsychotic activity. PD 144418 is a high affinity, potent and selective sigma 1 (σ1) receptor ligand (Ki: 0.08 nM and 1377 nM for σ1 and σ2 respectively). It shows devoid of any significant affinity for other receptors, ion channels, and enzymes.
CM398 is an orally active chemical compound that acts as a highly selective ligand for the sigma-2 receptor (K i =0.43 nM), demonstrating a significant ratio of selectivity between sigma-1 and sigma-2 receptors (1000-fold). Moreover, CM398 exhibits notable affinity towards dopamine (K i =32.90 nM) and serotonin transporters (K i =244.2 nM). In addition, CM398 has shown promising efficacy as an anti-inflammatory analgesic in a mouse model of inflammatory pain induced by formalin [1].