SB 706504 is a potent and selective antagonist of the 5-HT7 serotonin receptor. It is primarily used in scientific research to investigate the role of the 5-HT7 receptor in various physiological and pathological processes. This compound is valuable in studies related to the central nervous system, particularly in exploring conditions such as depression, anxiety, schizophrenia, and sleep disorders. Due to its high selectivity, SB 706504 helps researchers differentiate the effects mediated by the 5-HT7 receptor from those of other serotonin receptor subtypes. It is commonly applied in in vitro and in vivo models to assess receptor function, signal transduction pathways, and potential therapeutic targets. Its use contributes to the development of novel psychiatric and neurological treatments.