Used in biochemical research as an adenosine analog to study enzyme mechanisms, particularly in reactions involving adenosine kinase and other nucleoside-processing enzymes. Acts as a substrate mimic to inhibit or modulate enzymatic activity, helping to elucidate metabolic pathways. Also employed in the synthesis of modified nucleotides for antiviral or anticancer agent development. Its chloro group allows for further chemical modifications, making it a useful intermediate in medicinal chemistry.