[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an organic anion that is the major structure of chlortetracycline at pH 7.3 (according to Marvin v 6.2.0.). It is a conjugate base of a chlortetracycline."}, {"from": "gpt", "value": "[C][C@@][Branch2][=Branch1][Ring1][C@H1][C][C@H1][C@@H1][Branch2][Branch1][#Branch1][C][=Branch1][C][=O][C][=Branch2][Ring2][#Branch2][=C][Branch2][Ring2][Branch1][C@][Ring1][#Branch1][Branch2][Ring1][=C][C][=Branch1][C][=O][C][Ring1][N][=C][Branch2][Ring1][C][C][=C][Branch1][=N][C][=C][C][=Branch1][#Branch1][=C][Ring1][=Branch1][Ring2][Ring1][Ring2][Cl][O][O-1][O][O-1][C][=Branch1][C][=O][N][NH1+1][Branch1][C][C][C][O]"}]