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