Fmoc-D-Abu-OH is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) methods. It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group acts as a temporary protecting group for the amine functionality during the synthesis process. This allows for the sequential addition of amino acids to build peptides with high precision. The D-configuration of Abu (α-aminobutyric acid) makes it valuable in creating peptides with specific stereochemistry, which is crucial for studying biological activity and structure-activity relationships. Additionally, it is employed in the development of peptide-based drugs, peptidomimetics, and biochemical research, where the incorporation of non-natural amino acids is required to enhance stability, bioavailability, or target specificity.