[{"from": "human", "value": "Describe this molecule. [C][C][=Branch1][C][=C][C][Branch1][#Branch1][O][C][=Branch1][C][=O][C][O][C][=Branch1][C][=O][C]"}, {"from": "gpt", "value": "The molecule appears as a liquid. Density 1.04 g / cm3; highly toxic."}]