[{"from": "human", "value": "Provide a description of this molecule. [C][C][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][C][=Branch1][C][=O][C]"}, {"from": "gpt", "value": "Phenacetin was withdrawn from the Canadian market in June 1973 due to concerns regarding nephropathy (damage to or disease of the kidney)."}]