Used in organic synthesis as an intermediate for pharmaceuticals and bioactive compounds. Serves as a building block in the preparation of indole-based drugs, including those with potential antitumor, anti-inflammatory, and antimicrobial activities. Commonly employed in the development of serotonin receptor ligands and other neuroactive agents. Also utilized in the synthesis of fluorescent dyes and sensors due to its conjugated structure, which supports light absorption and emission properties.