[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][=C][C][=C][C][=C][C][=Branch1][Branch2][=C][C][Ring1][=Branch1][=C][Ring1][#Branch2][C][=C][C][=C][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=Branch1][=Branch1][=C][Ring1][#Branch2][Ring1][P][C][=C][Ring2][Ring1][Ring2]"}, {"from": "gpt", "value": "The molecule is an aromatic hydrocarbon that consists of six fused rings and is produced by the incomplete combustion of organic matter. Dibenzo[a,i]pyrene is primarily found in gasoline exhaust, tobacco smoke and coal tar. Dibenzo[a,i]pyrene is reasonably anticipated to be a human carcinogen. (NCI05)"}]