InChI=1S/C20H18O15/c21-7-1-5(17(28)29)3-9(11(7)23)33-19(32)6-2-8(22)12(24)10(4-6)34-20-15(27)13(25)14(26)16(35-20)18(30)31/h1-4,13-16,20-27H,(H,28,29)(H,30,31)