Used in peptide synthesis as a protecting group for amino acids, specifically glycine. The Fmoc group protects the amino group during the coupling process, ensuring selective reactions. It is particularly useful in solid-phase peptide synthesis (SPPS) for constructing complex peptides and proteins. The active ester (OSu) facilitates efficient coupling with other amino acids or peptide chains. This compound is widely applied in pharmaceutical research, biotechnology, and the development of therapeutic peptides. Its stability and ease of removal under mild conditions make it a preferred choice in peptide chemistry.