A highly selective and relatively potent group II metabotropic glutamate receptor agonist. EC50 values are 0.4, 0.4, > 100, > 100, > 300 and > 300 μM for human mGlu2, mGlu3, mGlu1, mGlu5, mGlu4 and mGlu7 receptors respectively. Centrally active following systemic administration in vivo. Also available as part of the Group II mGlu Receptor Tocriset™.