[{"from": "human", "value": "Provide a description of this molecule. [C][Branch1][=C][C][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][C][C][C][C][C][C][C][C][O]"}, {"from": "gpt", "value": "The molecule is an omega-hydroxy-long-chain fatty acid anion that is the conjugate base of 18-hydroxyoctadecanoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is functionally related to an octadecanoate. It is a conjugate base of a 18-hydroxyoctadecanoic acid."}]