Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of serotonin receptor modulators and other central nervous system agents. Its structure supports the construction of complex indole-based molecules with biological activity. Commonly employed in research settings for designing compounds with potential antidepressant, anxiolytic, or antipsychotic effects. Also utilized in the preparation of fluorescent probes and dyes due to the indole backbone’s photophysical properties. Plays a role in medicinal chemistry for structure-activity relationship (SAR) studies involving tryptamine and tryptophan derivatives.