[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a member of pteridines. It has a role as an Escherichia coli metabolite and a cofactor."}, {"from": "gpt", "value": "[C][C][N][C][=N][C][=N][C][=C][Ring1][=Branch1][N][Ring1][#Branch2]"}]