This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS). It serves as a protected amino acid derivative, where the Fmoc (fluorenylmethyloxycarbonyl) group protects the amino group, and the Mtt (4-methyltrityl) group protects the side chain amine of diaminobutyric acid (Dab). This protection strategy allows for selective deprotection during the synthesis process, enabling the stepwise construction of complex peptides. It is especially valuable in synthesizing peptides with multiple functional groups or those requiring precise side-chain modifications. Its application is common in pharmaceutical research, drug development, and the production of biologically active peptides.