[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a xanthine oxidase inhibitor and a widely used medication for gout. Allopurinol is a rare but well known cause of acute liver injury that has features of a hypersensitivity reaction and can be severe and even fatal."}, {"from": "gpt", "value": "[C][=N][N][C][=C][Ring1][Branch1][C][=Branch1][C][=O][N][C][=N][Ring1][#Branch1]"}]