Used in peptide synthesis as a building block for creating modified peptides with specific biological activities. It is particularly valuable in research focused on enzyme inhibitors, receptor ligands, and drug development. The nitro group on the phenyl ring enhances its reactivity, making it useful for further chemical modifications. It is also employed in studies exploring structure-activity relationships (SAR) to optimize peptide-based therapeutics. Additionally, it serves as a precursor in the synthesis of complex molecules for biochemical and pharmacological investigations.