[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a purine and a reaction intermediate in the metabolism of adenosine and in the formation of nucleic acids by the salvage pathway."}, {"from": "gpt", "value": "[C][=N][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][=Branch1][C][=O][N][C][=N][Ring1][Branch2]"}]