A selective and potent GluR5 kainate receptor agonist (Ki = 4.3 nM), inactive at GluR6 (Ki > 1 mM) and only weakly active at AMPA receptors (GluR1-4) and the kainate receptors KA-2 and GluR7 (Ki values of 6 - 14 μM). Also available as part of the Kainate Receptor Tocriset™.