Used in organic synthesis as an intermediate for pharmaceuticals and functional materials. Serves as a building block in the preparation of bioactive molecules, particularly in the development of indole-based compounds with potential medicinal properties. Commonly employed in the synthesis of fluorescent dyes and optoelectronic materials due to its conjugated aldehyde group and aromatic structure. Also utilized in research settings for creating ligands in coordination chemistry and in the design of novel heterocyclic systems for drug discovery.