Used as a key intermediate in the synthesis of pharmaceuticals, featuring an amino group at position 5 and a carbonitrile at position 3 on the indole ring, which enable diverse derivatizations. Particularly applied in the development of serotonin receptor modulators, central nervous system agents, anti-cancer drugs, antidepressants, antipsychotics, and anti-inflammatory compounds. Its structure supports the construction of complex heterocyclic compounds found in bioactive molecules. Commonly employed in multistep research syntheses for novel indole-based compounds. Also utilized in the preparation of fluorescent dyes and optoelectronic materials due to its conjugated aromatic system.