[{"from": "human", "value": "Provide a description of this molecule. [C][N][C@@H1][Branch1][=Branch2][C][C][=C][N][=C][N][Ring1][Branch1][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a N(alpha)-methyl-L-histidines that is L-histidine bearing a single methyl substituent at the N(alpha)-position. It is a tautomer of a N(alpha)-methyl-L-histidine zwitterion."}]