[{"from": "human", "value": "Describe this molecule. [C][=C][C][=Branch1][P][=C][C][=C][Ring1][=Branch1][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][Br]"}, {"from": "gpt", "value": "The molecule is a L-cysteine thioether and a bromoamino acid. It is a tautomer of a S-(4-bromophenyl)-L-cysteine zwitterion."}]