Used in solid-phase peptide synthesis as a protected tripeptide building block. The Fmoc group allows for mild base deprotection, enabling stepwise assembly of complex peptides without affecting other functional groups. The tert-butyl ester protects the C-terminal carboxylic acid, preventing unwanted reactions during coupling steps. Commonly applied in the synthesis of bioactive peptides and peptide-based pharmaceuticals where precise sequence control is critical. Its stability and selective deprotection make it valuable in automated peptide synthesizers and research involving structured peptide chains.