[{"from": "human", "value": "Describe this molecule. [C][C][C][C][C][C][C][C][C][Branch1][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a 3-methyl fatty acid anion that is the conjugate base of 3-methylundecanoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a 3-methyl fatty acid anion, a medium-chain fatty acid anion and a fatty acid anion 12:0. It is a conjugate base of a 3-methylundecanoic acid."}]