TCS 21311 is primarily utilized in the field of neuroscience and pharmacology as a selective antagonist for certain serotonin receptors. Its ability to specifically target these receptors makes it a valuable tool in research studies aimed at understanding the role of serotonin in various physiological and psychological processes. Researchers use TCS 21311 to investigate conditions such as anxiety, depression, and schizophrenia, where serotonin signaling is often disrupted. Additionally, it aids in the development of new therapeutic agents by providing insights into receptor mechanisms and potential drug interactions. Its application extends to behavioral studies in animal models, helping to elucidate the impact of serotonin modulation on mood, cognition, and social behavior.