Used primarily in peptide synthesis, it serves as a protected form of glutamic acid. The tert-butyl ester group protects the carboxyl side chain, while the methyl ester protects the alpha-carboxyl group, allowing selective deprotection during peptide assembly. This compound is valuable in solid-phase peptide synthesis, enabling the construction of complex peptides with precise control over amino acid incorporation. It is particularly useful in synthesizing peptides with glutamic acid residues, ensuring stability and efficiency in the coupling process. Additionally, it finds application in the development of pharmaceuticals, where peptides play a critical role in drug design and therapeutic agents.