Used in biochemical research as a nucleoside analog, particularly in studies involving purine metabolism and enzyme inhibition. Serves as an intermediate in the synthesis of antiviral and anticancer agents due to its structural similarity to natural purines. Also employed in the development of modified nucleic acids for therapeutic and diagnostic applications, including antisense oligonucleotides and RNA interference technologies. Its thione group enhances binding affinity and stability in nucleic acid complexes, making it valuable in molecular biology and drug design.