[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][C][C][C][C][C][Branch1][C][C][C][C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a methyl-branched fatty acid anion that is the conjugate base of 12-methyloctadecanoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a methyl-branched fatty acid anion, a long-chain fatty acid anion and a fatty acid anion 19:0. It is a conjugate base of a 12-methyloctadecanoic acid."}]