Used as a key intermediate in the synthesis of pharmaceuticals, particularly in the development of antitumor and antimicrobial agents. Its structure supports the creation of complex heterocyclic compounds that interact with biological targets such as kinases and DNA-processing enzymes. Commonly employed in medicinal chemistry for modifying isoquinoline-based drugs to enhance potency, selectivity, and metabolic stability. Also utilized in research settings for designing novel bioactive molecules and probing enzyme mechanisms in oncology and infectious disease studies.