[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a methyl-branched fatty acid. It is a conjugate acid of a 2-methyl-(2E)-pentenoate(1-)."}, {"from": "gpt", "value": "[C][C][/C][=C][Branch1][C][\\C][/C][=Branch1][C][=O][O]"}]