[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is used to control enteric infections in chicken and to improve growth and feed efficiency. Roxarsone is a fda approved additive for chicken, turkey and swine feeds."}, {"from": "gpt", "value": "[C][=C][C][=Branch2][Ring1][Branch1][=C][Branch1][=N][C][=C][Ring1][=Branch1][As][=Branch1][C][=O][Branch1][C][O][O][N+1][=Branch1][C][=O][O-1][O]"}]