Used in solid-phase peptide synthesis, this compound enables the controlled incorporation of a modified tyrosine residue into peptide chains. The Fmoc group provides orthogonal protection, allowing selective deprotection under mild basic conditions without affecting other sensitive functional groups. Its 3-methyl-L-tyrosine structure introduces steric and electronic modifications that can enhance peptide stability, influence receptor binding affinity, or improve metabolic resistance in pharmaceutical research. Commonly applied in the development of bioactive peptides, enzyme inhibitors, and peptide-based probes where precise side-chain functionality is required.