[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is conjugate base of (R)-piperazine-2-carboxylic acid. It is a conjugate base of a (R)-piperazine-2-carboxylic acid and a (R)-piperazine-2-carboxylic acid zwitterion. It is an enantiomer of a (S)-piperazine-2-carboxylate."}, {"from": "gpt", "value": "[C][C][N][C@H1][Branch1][Branch1][C][N][Ring1][=Branch1][C][=Branch1][C][=O][O-1]"}]