[{"from": "human", "value": "Please give me some details about this molecule. [C][C][C][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 long-chain unsaturated fatty acid anion that is the conjugate base of hexadec-9-enoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a long-chain fatty acid anion, an unsaturated fatty acid anion and a hexadecenoate. It is a conjugate base of a hexadec-9-enoic acid."}]