InChI=1S/C20H18O11/c21-6-8-5-9(22)13-11(29-8)4-7-2-1-3-10(12(7)14(13)23)30-20-17(26)15(24)16(25)18(31-20)19(27)28/h1-5,15-18,20-21,23-26H,6H2,(H,27,28)