[{"from": "human", "value": "Please give me some details about this molecule. [C][C][=C][Branch2][=Branch1][Branch2][C][=C][C][=N][C][=Branch2][Ring2][P][=C][C][=N][C][=Branch2][Ring1][N][=C][C][=C][Branch2][Ring1][Branch1][C][=Branch1][S][=C][Branch1][Ring2][N][Ring1][Branch1][C][=C][Ring2][Ring1][Ring1][N][Ring2][Ring1][C][C][=C][C][C][=Branch1][O][=C][Ring1][P][C][C][C][=Branch1][C][=O][O-1][C][C][=Branch1][=Branch1][=C][Ring2][Ring1][=N][C][C][C][C][=Branch1][C][=O][O-1][C][=C]"}, {"from": "gpt", "value": "The molecule is the dicarboxylate anion of protoporphyrin, obtained by deprotonation of both carboxy groups. It is a conjugate base of a protoporphyrin."}]