[{"from": "human", "value": "Describe this molecule. [C][C][=C][N][C][=Branch1][C][=O][N][C][Ring1][#Branch1][=O]"}, {"from": "gpt", "value": "The molecule is a pyrimidine nucleobase that is uracil in which the hydrogen at position 5 is replaced by a methyl group. It has a role as a human metabolite, an Escherichia coli metabolite and a mouse metabolite. It is a pyrimidine nucleobase and a pyrimidone."}]