[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a pentanone that is pentane carrying an oxo group at position 3. It has been isolated from Triatoma brasiliensis and Triatoma infestans. It has a role as an animal metabolite."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][C][C]"}]