[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a piperidinecarboxylate that is the conjugate base of 1-piperideine-2-carboxylic acid. It has a role as a human metabolite. It is a conjugate base of a 1-piperideine-2-carboxylic acid."}, {"from": "gpt", "value": "[C][C][C][N][=C][Branch1][Ring2][C][Ring1][=Branch1][C][=Branch1][C][=O][O-1]"}]