[{"from": "human", "value": "Provide a description of this molecule. [C][C][O][C][Branch1][C][C][Branch1][C][C][C]"}, {"from": "gpt", "value": "The molecule is an ether having ethyl and tert-butyl as the two alkyl components. It is used as an engine fuel additive to reduce emissions of carbon monoxide and soot. It has a role as a fuel additive. It is an ether and a volatile organic compound."}]