Used in organic synthesis as an intermediate for pharmaceuticals and biologically active compounds. Serves as a building block in the development of serotonin receptor modulators and other neuroactive agents. Employed in research related to indole-based derivatives for potential use in central nervous system disorders. Also utilized in the preparation of fluorescent probes and dyes due to its aromatic and electron-donating properties. Common in medicinal chemistry for structure-activity relationship studies involving indole scaffolds.