Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of kinase inhibitors and other biologically active molecules. Its structure allows for selective derivatization, making it valuable in medicinal chemistry for constructing drug candidates targeting inflammation, cancer, and central nervous system disorders. Commonly employed in solid-phase and solution-phase organic synthesis due to the reactivity of the amidine group. Also utilized in the preparation of labeled compounds for biochemical assays and receptor binding studies.