Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of antiviral and anticancer agents. Its functional groups—amino, hydroxyl, and thiol—allow for selective chemical modifications, making it valuable in constructing purine-based analogs. It has been investigated for potential use in targeted therapies due to its ability to interact with enzymes involved in nucleic acid metabolism. Additionally, it serves as a building block in the preparation of biologically active molecules and prodrugs designed to improve bioavailability and reduce side effects.