Used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS), as a protected amino acid derivative. The Fmoc group provides temporary protection for the amino group, while the OcHex (cyclohexyl ester) protects the carboxylic acid side chain of glutamic acid. This allows selective deprotection and coupling during the stepwise assembly of peptides. It is especially useful in synthesizing peptides containing glutamic acid residues, ensuring precise control over the sequence and minimizing side reactions. Commonly applied in pharmaceutical research, biotechnology, and the development of peptide-based drugs or biomaterials.