[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is a cyclic tetrapyrrole anion obtained by deprotonation of the four carboxy groups of coproporphyrin I; major species at pH 7.3. It is a conjugate base of a coproporphyrin I."}, {"from": "gpt", "value": "[C][C][=C][Branch2][=Branch1][=C][C][=C][C][=N][C][=Branch2][Branch1][#Branch1][=C][C][=N][C][=Branch2][Ring1][P][=C][C][=C][Branch2][Ring1][#Branch2][C][=Branch1][S][=C][Branch1][Ring2][N][Ring1][Branch1][C][=C][Ring2][Ring1][Ring1][N][Ring2][Ring1][C][C][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][=Branch1][=C][Ring2][Ring1][Ring2][C][C][C][C][=Branch1][C][=O][O-1][C][=Branch1][=Branch1][=C][Ring2][Ring1][S][C][C][C][C][=Branch1][C][=O][O-1][C][C][C][=Branch1][C][=O][O-1]"}]