[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is an S-conjugate L-cysteine zwitterion substituted by a benzyl group; major species at pH 7.3."}, {"from": "gpt", "value": "[C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][C][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]