[{"from": "human", "value": "Describe this molecule. [C][C][C][C][=C]"}, {"from": "gpt", "value": "The molecule is a colorless liquid with an odor of gasoline. Flash point -20 \u00b0F (Aldrich). Insoluble in water and less dense than water. Hence floats on water. Flammable vapor is produced. Boiling point 86 \u00b0F. (USCG, 1999)"}]