[{"from": "human", "value": "Provide a description of this molecule. [C][=C][N][C][=Branch1][Ring2][=C][Ring1][Branch1][C][C][=C][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][C][=C][C][=C][Branch1][Ring2][N][Ring1][Branch1][C][C][=C][C][=C][N][Ring1][Branch1]"}, {"from": "gpt", "value": "The molecule is a linear tetrapyrrole fundamental parent that consists of four pyrrole units connected via methylene linkages between positions 2 and 5. It is a tetrapyrrole fundamental parent and a member of bilanes."}]