[{"from": "human", "value": "Describe this molecule. [C][C][Branch2][Ring1][=Branch2][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][C][C][=Branch1][C][=O][O-1][O]"}, {"from": "gpt", "value": "The molecule is an (omega-1)-hydroxy fatty acid anion that is the conjugate base of 21-HDoHE, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a hydroxydocosahexaenoate, an (omega-1)-hydroxy fatty acid anion and a long-chain fatty acid anion. It is a conjugate base of a 21-HDoHE."}]