CPCCOEt is a drug used in scientific research, which acts as a non-competitive antagonist at the metabotropic glutamate receptor subtype mGluR<sub>1</sub>, with high selectivity although only moderate binding affinity. It is used mainly in basic research into the function of the mGluR<sub>1</sub> receptor, including the study of behavioural effects in animals including effects on memory and addiction.