This chemical is widely used in peptide synthesis as a protecting group for glutamic acid. It helps prevent unwanted side reactions during the formation of peptide bonds, ensuring the desired sequence is achieved. The tert-butyloxycarbonyl (Boc) group protects the amino functionality, while the benzyl ester (OBzl) safeguards the carboxyl group. The N-hydroxysuccinimide ester (OSu) enhances reactivity, facilitating efficient coupling with other amino acids or peptides. It is particularly valuable in solid-phase peptide synthesis, where controlled and stepwise assembly of peptides is required. Its stability under various reaction conditions makes it a reliable choice for producing complex peptides used in pharmaceuticals, research, and biotechnology.