[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a methyl ketone that is butan-2-one substituted by a hydroxy group at position 3. It has a role as a metabolite. It is a methyl ketone and a secondary alpha-hydroxy ketone."}, {"from": "gpt", "value": "[C][C][Branch1][=Branch1][C][=Branch1][C][=O][C][O]"}]