Used as a key intermediate in the synthesis of phosphodiesterase inhibitors, particularly PDE5 inhibitors, which are important in the treatment of erectile dysfunction and pulmonary arterial hypertension. It serves as a building block in medicinal chemistry for developing bioactive molecules due to its nitrogen-rich heterocyclic structure. Its derivatives are also explored in research for anticancer, antiviral, and anti-inflammatory agents. Commonly employed in the pharmaceutical industry for structure-activity relationship studies aimed at optimizing drug potency and selectivity.