Used primarily in solid-phase peptide synthesis, this compound serves as a protected amino acid building block. The Fmoc group provides temporary protection for the amino terminus, allowing selective deprotection under mild basic conditions while maintaining stability during chain elongation. The 2-nitro substituent on the phenylalanine side chain acts as a precursor for further functionalization, particularly in the synthesis of modified peptides where the nitro group can be reduced to an amino group, enabling site-specific conjugation or cyclization reactions. Its application is especially valuable in the preparation of bioactive peptides, peptide probes, and peptidomimetics used in pharmaceutical research and development.