Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of antiviral and central nervous system agents. Its structure supports the creation of bioactive molecules due to its ability to act as a rigid scaffold, enhancing binding selectivity and metabolic stability. Commonly employed in medicinal chemistry for optimizing drug candidates targeting neurological disorders and infectious diseases. Also utilized in the preparation of enzyme inhibitors and receptor modulators, where its fused heterocyclic core contributes to improved pharmacokinetic properties.