[{"from": "human", "value": "Provide a brief overview of this molecule. [C][Branch1][=Branch1][C][=Branch1][C][=O][O][Branch1][C][N][N][C][=Branch1][C][=O][N]"}, {"from": "gpt", "value": "The molecule is allantoic acid in which one of the aminocarbonyl groups is replaced by hydrogen. It is a member of ureas and a non-proteinogenic alpha-amino acid. It is a tautomer of a 2-ureidoglycine zwitterion."}]