InChI=1S/C21H20O13/c1-3-7-11(12(18(26)27)20(30)31-2)13(22)10-8(32-7)5-4-6-9(10)33-21-16(25)14(23)15(24)17(34-21)19(28)29/h3-6,12,14-17,21,23-25H,1H2,2H3,(H,26,27)(H,28,29)