This chemical is primarily used in peptide synthesis, particularly as a protected form of cysteine. The fluorenylmethoxycarbonyl (Fmoc) group acts as a temporary protecting group for the amino group, while the triphenylmethyl (Trt) group protects the thiol functionality of cysteine. This dual protection allows for the selective deprotection of the amino group during solid-phase peptide synthesis, enabling the stepwise construction of peptides. It is especially valuable in synthesizing complex peptides where cysteine residues are involved, ensuring the thiol group remains intact until the final deprotection step. This compound is essential in producing peptides for pharmaceutical research, drug development, and biochemical studies.