[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a polyunsaturated fatty acid anion that is the conjugate base of (4Z,7Z,10Z,13Z,16Z)-docosapentaenoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a polyunsaturated fatty acid anion, a long-chain fatty acid anion, a docosapentaenoate and a (4Z,7Z,10Z,13Z,16Z)-docosapentaenoyl derivative. It is a conjugate base of a (4Z,7Z,10Z,13Z,16Z)-docosa-4,7,10,13,16-pentaenoic acid."}, {"from": "gpt", "value": "[C][C][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]"}]