[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an oxodocosahexaenoate that is the conjugate base of (4Z,7Z,10Z,14E,16Z,19Z)-13-oxodocosahexaenoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a (4Z,7Z,10Z,14E,16Z,19Z)-13-oxodocosahexaenoic acid."}, {"from": "gpt", "value": "[C][C][/C][=C][\\C][/C][=C][\\C][=C][\\C][=Branch1][C][=O][C][/C][=C][\\C][/C][=C][\\C][/C][=C][\\C][C][C][=Branch1][C][=O][O-1]"}]