[{"from": "human", "value": "What can you tell me about this molecule? [C][C][N][C][C@H1][Branch1][Ring2][NH2+1][Ring1][=Branch1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is zwitterionic form of (S)-piperazine-2-carboxylic acid having an anionic carboxy group and a protonated 1-amino group. It is a conjugate acid of a (S)-piperazine-2-carboxylate. It is a tautomer of a (S)-piperazine-2-carboxylic acid."}]