[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a monocarboxylic acid anion that is the conjugate base of 9-[(10Z)-heptadecenoyloxy]-octadecanoic acid, obtained by deprotonation of the carboxy group; major species at pH 7.3."}, {"from": "gpt", "value": "[C][C][C][C][C][C][C][C][C][C][Branch1][=N][C][C][C][C][C][C][C][C][=Branch1][C][=O][O-1][O][C][=Branch1][C][=O][C][C][C][C][C][C][C][C][/C][=C][\\C][C][C][C][C][C]"}]