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