[{"from": "human", "value": "Provide a description of this molecule. [C][O][C][=C][C][=Branch1][S][=C][C@@H1][C][C][O][C@@H1][Ring1][Branch1][O][C][Ring1][Branch2][=C][Ring1][N][O][C][=C][C][=C][C][=Branch1][=Branch2][=C][Ring1][=Branch1][C][Ring2][Ring1][Ring1][=O][O]"}, {"from": "gpt", "value": "The molecule is a sterigmatocystin whose skeleton comprises a xanthone ring system ortho-fused to a dihydrofuranofuran moiety. It has a role as a metabolite and a carcinogenic agent. It is a member of sterigmatocystins and a cyclic acetal."}]