[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][Branch1][Ring1][C][=O][C][=O]"}, {"from": "gpt", "value": "The molecule is a dialdehyde that is propane substituted by two oxo groups at the terminal carbon atoms respectively. A biomarker of oxidative damage to lipids caused by smoking, it exists in vivo mainly in the enol form. It has a role as a biomarker."}]