This chemical is primarily used in peptide synthesis as a protected amino acid derivative. It serves as a building block for constructing peptides, where the fluorenylmethoxycarbonyl (Fmoc) group acts as a protecting group for the amino functionality. This allows selective deprotection during solid-phase peptide synthesis, enabling the stepwise assembly of peptide chains. Its application is crucial in the production of custom peptides for research, pharmaceuticals, and biotechnology, particularly in developing therapeutic peptides and studying protein interactions. The ethylpentanoic acid moiety contributes to its structural stability and solubility in organic solvents, making it suitable for use in automated peptide synthesizers.