[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is an amino acid zwitterion obtained via transfer of a proton from the carboxy to the amino group of S-(4-bromophenyl)-L-cysteine; major species at pH 7.3. It is a tautomer of a S-(4-bromophenyl)-L-cysteine."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][P][=C][C][=C][Ring1][=Branch1][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][Br]"}]