(2S)-2-{[(tert-butoxy)carbonyl]amino}-3-[(triphenylmethyl)sulfanyl]propanoic acid

This compound is a protected cysteine derivative used as a building block in peptide synthesis. It features a tert-butoxycarbonyl (Boc) protecting group on the amino group and a trityl (Trt) protecting group on the thiol side chain, enabling selective deprotection during solid-phase or solution-phase peptide assembly.