Used as a key intermediate in the synthesis of biologically active compounds, particularly in pharmaceuticals targeting serotonin and kinase pathways. Its structure supports the development of indole-based inhibitors with potential antitumor and anti-inflammatory properties. Commonly employed in medicinal chemistry for constructing heterocyclic frameworks via nucleophilic addition or cyclization reactions. Also utilized in the preparation of fluorescent probes due to its conjugated aldehyde functionality, enabling derivatization for imaging applications.