[{"from": "human", "value": "Generate a molecule based on this description. The molecule is the aldehyde formed from acetic acid by reduction of the carboxy group. It is the most abundant carcinogen in tobacco smoke. It has a role as a human metabolite, an EC 3.5.1.4 (amidase) inhibitor, a carcinogenic agent, a mutagen, a teratogenic agent, an oxidising agent, an electron acceptor, a Saccharomyces cerevisiae metabolite, an Escherichia coli metabolite and a mouse metabolite."}, {"from": "gpt", "value": "[C][C][=O]"}]