Used in organic synthesis as a key intermediate for pharmaceuticals and bioactive compounds. Serves as a building block in the development of serotonin receptor modulators and neurochemical research agents. Applied in the study of indole-based neurotransmitters and their analogs. Also utilized in the preparation of fluorescent probes and dyes due to its indole backbone, which supports conjugation and light absorption properties. Common in medicinal chemistry for structure-activity relationship studies involving tryptamine derivatives.