[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a methyl-branched fatty acid that is undecanoic acid substituted by a methyl group at position 10. It is a branched-chain saturated fatty acid, a methyl-branched fatty acid and a medium-chain fatty acid. It is functionally related to an undecanoic acid."}, {"from": "gpt", "value": "[C][C][Branch1][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O]"}]