[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a furan carrying acetyl and methyl substituents at the 2- and 5-positions respectively. It is a member of furans, a methyl ketone and an aromatic ketone."}, {"from": "gpt", "value": "[C][C][=C][C][=C][Branch1][Ring2][O][Ring1][Branch1][C][=Branch1][C][=O][C]"}]