Boc-N-Me-Tyr-OH.DCHA (CAS 95105-25-2), or N-tert-butoxycarbonyl-N-methyl-L-tyrosine dicyclohexylammonium salt, is a protected amino acid derivative commonly used in peptide synthesis. It features a Boc (tert-butoxycarbonyl) group on the nitrogen to prevent unwanted reactions during coupling steps, and an N-methylated tyrosine backbone that introduces conformational rigidity and enhances resistance to enzymatic degradation. The dicyclohexylammonium (DCHA) salt form improves solubility and handling in organic solvents such as chloroform, DMSO, and ethyl acetate.