[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a dimethylnaphthalene carrying methyl groups at positions 1 and 4."}, {"from": "gpt", "value": "[C][C][=C][C][=C][Branch1][O][C][=C][C][=C][C][=C][Ring1][#Branch2][Ring1][=Branch1][C]"}]