Used in peptide synthesis, particularly in the preparation of complex peptides requiring stereochemical control. Its D-aspartic acid configuration helps resist enzymatic degradation, making it valuable in developing stable peptide-based pharmaceuticals. The BOC (tert-butoxycarbonyl) group serves as a protecting group for the amino function, allowing selective deprotection during stepwise synthesis. The OFM (9-fluorenylmethyloxycarbonyl) ester protects the side-chain carboxylic acid, enabling orthogonal protection strategies—this allows precise control over coupling reactions in solid-phase or solution-phase peptide assembly. Commonly applied in research settings for synthesizing glycopeptides, enzyme inhibitors, and other bioactive molecules where aspartic acid residues need selective modification.