This compound is an Fmoc-protected derivative of 1,2,3,4-tetrahydronaphthalene-2-carboxylic acid, serving as a building block in peptide synthesis. The fluorenylmethoxycarbonyl (Fmoc) group protects the amino functionality, enabling selective incorporation of this unnatural amino acid analog into peptides during solid-phase synthesis. It prevents unwanted side reactions and allows stepwise assembly of peptide chains. The Fmoc group is orthogonally removable under mild basic conditions (e.g., piperidine), making it ideal for synthesizing complex peptides, peptidomimetics, and therapeutic agents. Applications include pharmaceutical research, biotechnology, and drug discovery targeting conformationally constrained peptides.