This compound is widely used in peptide synthesis, particularly in solid-phase peptide synthesis (SPPS) methods. It serves as a protected form of tyrosine, where the Fmoc (fluorenylmethyloxycarbonyl) group protects the amino group, and the OtBu (tert-butyl ester) group protects the carboxyl group. This protection allows for selective deprotection during the synthesis process, enabling the stepwise construction of peptides. It is especially valuable in the production of complex peptides for pharmaceutical research, drug development, and biochemical studies. Its stability and compatibility with SPPS protocols make it a preferred choice for synthesizing peptides with high purity and yield. Additionally, it is utilized in the study of protein-protein interactions and the development of peptide-based therapeutics.