[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a straight-chain alkane with 22 carbon atoms. It has a role as a plant metabolite."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C]"}]