[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a monounsaturated fatty acid aldehyde that is undec-10-enal substituted at position 2 by a methyl group. It is a 2-methyl-branched fatty aldehyde and a monounsaturated fatty aldehyde."}, {"from": "gpt", "value": "[C][C][Branch1][#Branch2][C][C][C][C][C][C][C][C][=C][C][=O]"}]