This is the dicyclohexylammonium salt of N-(2-nitrophenylsulfenyl)-L-alanine, a protected form of the amino acid L-alanine used as a building block in peptide synthesis. The 2-nitrophenylsulfenyl (Nps) group selectively protects the amino terminus, enabling the carboxylic acid to be activated for peptide bond formation without interference. The salt form enhances stability and solubility for easier handling in organic synthesis. It is particularly suited for solid-phase peptide synthesis, where precise reaction control is essential. The protecting group can be removed under mild conditions to avoid damaging the peptide chain. This compound plays a key role in synthesizing peptides for pharmaceutical research and drug development.