[{"from": "human", "value": "Describe this molecule. [C][=C][C][=C][C][=C][C][=Branch1][Branch2][=C][C][Ring1][=Branch1][=C][Ring1][#Branch2][C][=C][C][=C][C][=C][Ring1][=Branch1][C][=C][C][=C][C][=Branch1][=Branch1][=C][Ring1][=Branch1][Ring1][P][C][=C][Ring2][Ring1][Ring2]"}, {"from": "gpt", "value": "The molecule is a yellowish-reddish, aromatic hydrocarbon consisting of six fused rings and produced by incomplete combustion of organic matter. Dibenzo[a,e]pyrene is primarily found in gasoline exhaust, tobacco smoke and fossil fuels. This substance is used only for research purposes. Dibenzo[a,e]pyrene is reasonably anticipated to be a human carcinogen. (NCI05)"}]