[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a docosanoid anion that is the conjugate base of (4Z,7Z,10Z,13Z,16Z)-19,20-epoxydocosapentaenoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a docosanoid anion, a long-chain fatty acid anion and an epoxydocosapentaenoate. It is functionally related to a (4Z,7Z,10Z,13Z,16Z,19Z)-docosahexaenoate. It is a conjugate base of a (4Z,7Z,10Z,13Z,16Z)-19,20-epoxydocosapentaenoic acid."}, {"from": "gpt", "value": "[C][C][C][C][Branch1][Ring2][O][Ring1][Ring1][C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][C][C][=Branch1][C][=O][O-1]"}]