Novel allosteric potentiator of the metabotropic glutamate receptor mGlu5. Devoid of agonist activity itself, but potentiates (3 - 6-fold) the action of agonists at mGlu5 without any effect at other mGlu subtypes (EC50 for potentiation = 2 - 5.3 μM). Purity 99%. MW (observed): 244.24