DL-AP7 is primarily used in neuroscience research as a selective antagonist for NMDA receptors. It helps in studying the role of these receptors in synaptic plasticity, learning, and memory processes. By blocking NMDA receptors, DL-AP7 allows researchers to investigate the mechanisms underlying excitatory neurotransmission and its impact on neurological disorders such as epilepsy, stroke, and neurodegenerative diseases. Additionally, it is utilized in experimental models to understand the neuroprotective effects and potential therapeutic strategies targeting glutamate-mediated excitotoxicity.