1:1 mixture of (1R,3R)- and (1S,3S)-ACPD. Potent NMDA receptor agonist and selective group II mGluR agonist (EC50 values are 13, 50, >300 and >300 μM at mGluR2, mGluR4, mGluR1 and mGluR5 respectively). Exhibits proconvulsant activity in vivo. (±)-trans-ACPD and (1S,3R)-ACPD also available.. MW (observed): 173.17.