[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a methyl-branched fatty acid that is octacosanoic acid (montanic acid) substituted by a methyl group at position 26. It is a branched-chain saturated fatty acid, a methyl-branched fatty acid and an ultra-long-chain fatty acid. It is functionally related to an octacosanoic acid."}, {"from": "gpt", "value": "[C][C][C][Branch1][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O]"}]