[{"from": "human", "value": "Please give me some details about this molecule. [C][=C][C][=Branch2][Branch2][=Branch1][=C][Branch2][#Branch1][N][C][=Branch2][#Branch1][Ring2][=C][C][=N][C][=Branch2][Branch1][=Branch2][=C][C][=N][C][=Branch2][Ring1][=C][=C][C][=C][Branch2][Ring1][C][C][=Branch1][Branch2][=C][Ring2][Ring1][C][N][Ring1][Branch1][C][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O][C][=Branch1][N][=C][Ring2][Ring1][Ring2][C][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O][C][=Branch1][N][=C][Ring2][Ring2][Ring1][C][C][C][=Branch1][C][=O][O][C][C][=Branch1][C][=O][O][N][Ring2][Branch1][C][C][C][=Branch1][C][=O][O][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is the porphyrin produced by oxidation of the methylene bridges in uroporphyrinogen. They have four acetic acid and four propionic acid side chains attached to the pyrrole rings. Uroporphyrinogen I and III are formed from polypyrryl methane in the presence of uroporphyrinogen III cosynthetase and uroporphyrin I synthetase, respectively. They can yield uroporphyrins by autooxidation or coproporphyrinogens by decarboxylation. Excessive amounts of uroporphyrin I are excreted in congenital erythropoietic porphyria, and both types I and III are excreted in porphyria cutanea tarda. Uroporphyrin I and III are the most common isomers."}]