N-Benzyloxycarbonyl-L-threonyl-glycin-ethylester is a protected dipeptide derivative. Its structure consists of L-threonine and glycine, where the N-terminus is protected by a benzyloxycarbonyl (Z or Cbz) group, and the C-terminus is esterified as an ethyl ester. This compound serves as a key building block in solid-phase and solution-phase peptide synthesis. The primary application of this compound is as a specialized intermediate in the synthesis of longer, more complex peptides and peptide-based pharmaceuticals. The Cbz protecting group on the amine is stable under many reaction conditions but can be selectively removed via catalytic hydrogenation or acidic conditions (e.g., HBr/AcOH), allowing for controlled chain elongation. The ethyl ester at the C-terminus can be hydrolyzed or transesterified as needed. It is particularly relevant for incorporating the L-threonine residue, an essential amino acid, into target sequences. As a protected dipeptide, it falls under the category of peptide synthesis reagents and intermediates used in medicinal chemistry research and the development of therapeutic peptides. Its use requires standard handling procedures for fine chemicals in a laboratory setting.