[{"from": "human", "value": "Describe this molecule. [C][=N][C][=Branch1][C][=O][N][C][=Branch1][=Branch2][=C][Ring1][#Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a nucleobase analogue that is cytosine in which the hydrogen at position 5 is replaced by a carboxy group. It has a role as a metabolite. It is an aminopyrimidine, a nucleobase analogue, a pyrimidone and an aromatic carboxylic acid. It is functionally related to a cytosine."}]