Used in glycochemistry research as a protected glycosyl amino acid building block for the synthesis of glycopeptides and glycoconjugates. The acetyl groups stabilize the sugar moiety during chemical reactions, while the benzyl ester protects the carboxylic acid function. This compound enables controlled glycosylation of serine residues, making it valuable for constructing complex biological molecules that mimic natural glycoproteins. It is particularly useful in developing synthetic vaccines and studying carbohydrate-protein interactions.