[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an alkane that is undecane substituted by a methyl group at position 4. Metabolite observed in cancer metabolism. It has a role as a human metabolite. It derives from a hydride of an undecane."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][Branch1][C][C][C][C][C]"}]