[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=C][C][=C][N][=C][C][Ring1][=Branch1][=C][Branch1][S][C][=C][Ring1][#Branch2][N][C][=C][C][=C][C][=C][Ring1][=Branch1][Ring1][=Branch2][C]"}, {"from": "gpt", "value": "The molecule is a organic heterotetracyclic compound that is pyrido[4,3-b]carbazole carrying two methyl substituents at positions 5 and 11. It has a role as an antineoplastic agent and a plant metabolite. It is an organic heterotetracyclic compound, an organonitrogen heterocyclic compound, a polycyclic heteroarene and an indole alkaloid."}]