InChI=1S/C20H16O15/c21-5-1-4-7(11(24)9(5)22)8-3(17(28)29)2-6(10(23)15(8)34-19(4)32)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)