Used in glycosylation reactions for the synthesis of complex oligosaccharides and glycoconjugates. Acts as a glycosyl donor in the preparation of selenoglycosides, which are stable intermediates in carbohydrate chemistry. The azido group allows for further functionalization, such as reduction to an amine for use in glycoconjugate vaccines or probes. The acetyl protecting groups ensure regioselective reactivity during coupling steps. Commonly applied in the development of synthetic antigens and in studying carbohydrate-protein interactions.