InChI=1S/C20H16O15/c21-5-1-3(17(28)29)8-7-4(19(32)33-15(8)9(5)23)2-6(22)14(10(7)24)34-20-13(27)11(25)12(26)16(35-20)18(30)31/h1-2,11-13,16,20-27H,(H,28,29)(H,30,31)