[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the 7H-tautomer of purine. It is a tautomer of a 1H-purine, a 3H-purine and a 9H-purine."}, {"from": "gpt", "value": "[C][=C][C][=Branch1][=Branch1][=N][C][=N][Ring1][=Branch1][N][=C][N][Ring1][Branch2]"}]