[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a methyl ketone that is acetone in which one of the methyl groups has been replaced by a phenyl group. It has a role as a photosensitizing agent, an animal metabolite and a xenobiotic."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=O][C][=C][C][=C][C][=C][Ring1][=Branch1]"}]