[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][N][C][=C][Branch1][Branch1][N][=C][Ring1][Branch1][C][C][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a methylhistidine in which the methyl group is located at N-1. It has a role as a human urinary metabolite. It is a non-proteinogenic alpha-amino acid and a methylhistidine. It is a tautomer of a 1-methylhistidine zwitterion."}]