Used primarily in pharmaceutical research as a potent and selective antagonist for the sigma-1 receptor. It shows promise in the study of neurological and psychiatric disorders, including neuropathic pain, depression, and substance abuse. Due to its high affinity for sigma-1 receptors, it is employed in preclinical models to investigate receptor function and signaling pathways. It has also been utilized in radiolabeled form for receptor binding assays and neuroimaging studies, aiding in the visualization and quantification of sigma-1 receptor distribution in the central nervous system. Its structural specificity makes it a valuable tool compound in developing novel therapeutics targeting neurodegenerative and mood disorders.