(RS)-MCPG is primarily used in neuroscience research as a pharmacological tool to study glutamate receptors, particularly metabotropic glutamate receptors (mGluRs). It acts as a competitive antagonist at group I and group II mGluRs, helping researchers understand the role of these receptors in synaptic transmission, plasticity, and neurological disorders. Its application extends to investigating conditions such as epilepsy, neurodegenerative diseases, and psychiatric disorders, where glutamate signaling is implicated. By blocking specific mGluR subtypes, (RS)-MCPG aids in elucidating their functional contributions to brain physiology and pathology.