[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule appears as a liquid. Density 1.04 g / cm3; highly toxic."}, {"from": "gpt", "value": "[C][C][=Branch1][C][=C][C][Branch1][#Branch1][O][C][=Branch1][C][=O][C][O][C][=Branch1][C][=O][C]"}]