Used as a key intermediate in the synthesis of pharmaceutical compounds, particularly in the development of nitrogen-containing heterocyclic drugs. Its spirocyclic structure, reactive triazine ring, and tert-butyl carbamate protecting group for nitrogen enable controlled reactions, facile deprotection, and construction of complex bioactive molecules. Commonly employed in medicinal chemistry for modifying drug candidates to improve metabolic stability and binding selectivity, such as antimicrobials or enzyme inhibitors. Also utilized in agrochemical research for designing novel active ingredients requiring high structural specificity.