[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an altertoxin, which is a mycotoxin of Alternaria fungi. Altertoxins are important contaminants in cereals, vegetables, and fruits, as well as in the ground, on wood or walls. Studies have shown altertoxins to be toxic, genotoxic, mutagenic, and carcinogenic. In particular, they have been associated with esophageal cancer in humans. (A2977, A2979)"}, {"from": "gpt", "value": "[C][C][=C][C][=Branch2][Ring1][=C][=C][C][=C][Ring1][=Branch1][C][=C][Branch1][=C][C][=Branch1][#Branch2][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][O][C][O][C][=Branch1][C][=O][O][Ring1][=C][O]"}]