[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a long-chain alkane that is heptadecane substituted by methyl groups at positions 2, 6, 10 and 15. Metabolite observed in cancer metabolism. It has a role as a human metabolite. It derives from a hydride of a heptadecane."}, {"from": "gpt", "value": "[C][C][C][Branch1][C][C][C][C][C][C][C][Branch1][C][C][C][C][C][C][Branch1][C][C][C][C][C][C][Branch1][C][C][C]"}]