[{"from": "human", "value": "Provide a description of this molecule. [C][C][C][=C][C][=C][C][=C][Ring1][=Branch1]"}, {"from": "gpt", "value": "The molecule is an aromatic hydrocarbon composed of a benzene ring linked to an ethyl group. Ethylbenzene is a constituent of petroleum and coal tar and is used as either a petroleum additive or a chemical intermediate in the production of polystyrene. High level exposure to airborne ethylbenzene is associated with eye and throat irritation."}]