[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a cysteine zwitterion. It is a conjugate base of a D-cysteinium. It is a conjugate acid of a D-cysteinate(1-). It is an enantiomer of a L-cysteine zwitterion. It is a tautomer of a D-cysteine."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][S]"}]