[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][=Branch1][C][=O][N][C@@H1][Branch1][=Branch2][C][C][=C][N][=C][N][Ring1][Branch1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is the conjugate base of N-acetyl-L-histidine; major species at pH 7.3. It is a N-acyl-L-alpha-amino acid anion and a histidinate derivative. It is a conjugate base of a N-acetyl-L-histidine."}]