[{"from": "human", "value": "Provide a description of this molecule. [C][C][=C][Branch2][Ring2][P][C][=Branch2][Ring1][Branch2][=C][C][=C][Branch1][N][C][=Branch1][Branch2][=C][Branch1][Ring2][N][Ring1][Branch1][O][C][C][C][C][=Branch1][C][=O][O][N][C][Ring2][Ring1][C][=C][C][=N][C][=Branch1][C][=O][C][=Branch1][Branch1][=C][Ring1][=Branch1][C][C][=C][C][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a tripyrrole that is an oxidized metabolite of bilirubin, in which methyl groups are present at positions 3, 7 and 13 with a vinyl group at position 2. It derives from a hydride of a tripyrrin."}]