Potent, selective mGlu8a agonist (EC50 = 31 nM). Displays > 100-fold selectivity over mGlu1-7 and displays little or no activity at NMDA and kainate receptors. Increases c-Fos expression in stress-related brain areas following systemic administration in mice in vivo. Also potent anticonvulsant in mice in vivo. Caged (S)-3,4-DCPG (Cat. No. 3330), (RS)-3,4-DCPG (Cat. No. 1394) and (R)-3,4-DCPG (Cat. No. 1395) also available.