[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a hydrocarbon and one of three isomers of pentane. Pentanes are components of some fuels, such as gasoline, and are also used as specialty solvents in the laboratory. (L1287)"}, {"from": "gpt", "value": "[C][C][Branch1][C][C][Branch1][C][C][C]"}]