This chemical is widely used in peptide synthesis as a protected amino acid derivative. Its primary application is in the preparation of peptides where aspartic acid needs to be incorporated while protecting its reactive side chain. The Boc (tert-butyloxycarbonyl) group safeguards the amino group, while the OBzL (benzyl ester) protects the carboxyl group of aspartic acid. The ONp (para-nitrophenyl ester) moiety acts as an activating group, facilitating efficient coupling reactions with other amino acids or peptides. This compound is particularly useful in solid-phase peptide synthesis (SPPS) and solution-phase synthesis, enabling the controlled assembly of complex peptide sequences. Its stability and reactivity make it a valuable tool in the production of peptides for pharmaceutical research, drug development, and biochemical studies.