Used in glycopeptide synthesis as a protected glycosyl amino acid building block. The fluorenylmethoxycarbonyl (Fmoc) group enables solid-phase peptide synthesis by providing orthogonal protection for the amino group. The triacetyl groups protect hydroxyl moieties on the sugar unit, ensuring stability during coupling reactions. This compound allows precise incorporation of a modified galactose-linked serine into peptides, facilitating the study of glycosylation effects on protein structure and function. Commonly applied in developing glycoprotein mimetics and therapeutic candidates targeting cell-surface carbohydrate-protein interactions.