[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a beta-hydroxy ketone formed by hydroxylation of 4-methylpentan-2-one at the 4-position. It has been isolated from Achnatherum robustum. It has a role as a plant metabolite."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][C][Branch1][C][C][Branch1][C][C][O]"}]