[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a hydrocarbon and one of the isomers of heptane. Heptanes may be found in gasoline and are widely used as solvents. They are also sold as fuel for outdoor stoves. (L1289)"}, {"from": "gpt", "value": "[C][C][C][Branch1][C][C][Branch1][C][C][C][C]"}]