[{"from": "human", "value": "Provide a brief overview of this molecule. [C][C][=C][C][=Branch2][Ring2][S][=C][Branch2][Ring1][C][C][=C][Ring1][=Branch1][C][=Branch1][=Branch2][=C][C][=Branch1][C][=O][O][Ring1][#Branch1][O][C][C][=C][Branch2][Ring1][Branch1][C][=C][Branch1][S][C][=C][Ring1][=Branch1][O][C][=Branch1][C][=O][C][=C][Ring1][#Branch1][O][C][C][O][O]"}, {"from": "gpt", "value": "The molecule is a member of the class of 8,8'-bicoumarins that is kotanin in which the methoxy groups at the 7 and 7' positions are replaced by hydroxy groups. A fungal metabolite, its isolation from Aspergillus niger was first reported in 1979. It has a role as an Aspergillus metabolite. It is a conjugate acid of an orlandin(1-)."}]