[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a pyridopyrimidine."}, {"from": "gpt", "value": "[C][C][O][C][=Branch1][C][=O][C][=C][N+1][=Branch1][S][=C][C][C][C][C][Branch1][Branch2][N][Ring1][=Branch1][C][Ring1][#Branch2][=O][C][C]"}]