[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is an alpha-diketone that is pentane substituted at the 2- and 3-positions by oxo groups. It has a role as a flavouring agent. It is an alpha-diketone and a methyl ketone. It derives from a hydride of a pentane."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][C][=Branch1][C][=O][C]"}]