[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a monocarboxylic acid anion resulting from the removal of a proton from the carboxy group of dihydroartemisinic acid. The major species at pH 7.3. It is a conjugate base of a dihydroartemisinic acid."}, {"from": "gpt", "value": "[C][C@@H1][C][C][C@H1][Branch1][=C][C@@H1][C@H1][Ring1][=Branch1][C][C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C@@H1][Branch1][C][C][C][=Branch1][C][=O][O-1]"}]