Used in pharmaceutical synthesis, particularly in the development of antiviral and anticancer agents. It serves as a key intermediate in constructing pyrimidine-based heterocyclic compounds, which are common structural motifs in many bioactive molecules. Its hydrazine functionality allows for derivatization into hydrazones and azoles, enhancing its utility in drug discovery. Also employed in the preparation of functionalized nucleoside analogs and as a building block in combinatorial chemistry for screening new therapeutic candidates.