This chemical is primarily used in peptide synthesis as a protecting group for the amino acid D-asparagine. The Boc (tert-butyloxycarbonyl) group safeguards the amino group during the synthesis process, preventing unwanted reactions. The ONP (o-nitrophenyl) ester acts as an activating group, facilitating the coupling of D-asparagine to other amino acids or peptides. This compound is particularly valuable in solid-phase peptide synthesis (SPPS) and solution-phase peptide synthesis, where precise control over the assembly of amino acids is required. Its application is essential in producing peptides with high purity and specific sequences, which are crucial in biochemical research, drug development, and the study of protein interactions.