Used in organic synthesis as an intermediate for pharmaceuticals and bioactive compounds. Its structure supports the development of serotonin receptor ligands and other neuroactive agents. Commonly employed in the preparation of indole-based drug candidates, particularly in antidepressant and antipsychotic research. Also utilized in the synthesis of fluorescent probes and dyes due to its aromatic and electron-rich framework. Frequently appears in medicinal chemistry for structure-activity relationship (SAR) studies involving halogenated indoles.