[{"from": "human", "value": "Provide a description of this molecule. [C][O][C][=Branch1][C][=O][C][Branch1][=Branch2][C][C][=C][N][=C][N][Ring1][Branch1][N]"}, {"from": "gpt", "value": "The molecule is an alpha-amino acid ester that is the methyl ester of histidine. It has a role as a metabolite. It is an alpha-amino acid ester, a histidine derivative and a methyl ester."}]