glycine b coagonist site of nmda receptor

7-Chlorokynurenic acid (7-chloro-4-hydroxy-2-carboxyquinoline) is an effecitve and selective antagonist of NMDA receptor with IC50 of 0.56 μM for the glycine B coagonist site. 7-Chlorokynurenic acid inhibits the reuptake of glutamate into synaptic vesicles with a Ki of 0.59 μM and shows antinociceptive actions after neuraxial delivery.

7-Chlorokynurenic acid sodium salt (7-CKA sodium salt) is a potent and selective antagonist of the glycine B coagonist site of the NMDA receptor (IC50: 0.56 μM) and a potent inhibitor of the reuptake of glutamate into synaptic vesicles (Ki: 0.59 μM).