[{"from": "human", "value": "Describe this molecule. [C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N][S][S][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a sulfur-containing amino acid obtained by the oxidation of two cysteine molecules which are then linked via a disulfide bond. It has a role as a human metabolite and a mouse metabolite. It is an organic disulfide, a sulfur-containing amino acid and a cysteine derivative. It is a tautomer of a cystine zwitterion."}]