[{"from": "human", "value": "Provide a brief overview of this molecule. [C][=C][C][C][=Branch1][N][=C][C][=C][C][=C][C][Ring1][=Branch1][=N][Ring1][=Branch2][C][=C][Ring1][=N]"}, {"from": "gpt", "value": "The molecule is a carbazole. It is a tautomer of a 4aH-carbazole, a 9H-carbazole, a 3H-carbazole and a 1H-carbazole."}]