[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][Branch2][Ring1][Ring1][N][C][=Branch1][Ring2][=N][Ring1][Branch1][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a 2-(3-amino-3-carboxypropyl)-L-histidine in which position 3 on the side-chain has S-configuration. It is a tautomer of a 2-[(3S)-3-amino-3-carboxypropyl]-L-histidine dizwitterion."}]