InChI=1S/C21H20O14/c1-3-7-11(21(31,19(28)29)20(30)32-2)12(22)10-8(33-7)5-4-6-9(10)34-18-15(25)13(23)14(24)16(35-18)17(26)27/h3-6,13-16,18,23-25,31H,1H2,2H3,(H,26,27)(H,28,29)