[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a modified form of acetylcysteine that is a metabolite of benzene and may be found in the urine of smokers."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][N][C@@H1][Branch1][O][C][S][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O]"}]