[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a prostaglandin carboxylic acid anion that is the conjugate base of prostaglandin C2, obtained by deprotonation of the carboxy group; major species at pH 7.3. It is a conjugate base of a prostaglandin C2."}, {"from": "gpt", "value": "[C][C][C][C][C][C@@H1][Branch2][Ring1][Branch2][/C][=C][/C][=C][C][C][=Branch1][C][=O][C@@H1][Ring1][=Branch1][C][/C][=C][\\C][C][C][C][=Branch1][C][=O][O-1][O]"}]