InChI=1S/C22H20O13/c1-33-11-5-7(34-22-18(28)16(26)17(27)19(35-22)21(31)32)4-9-13(11)15(25)12-8(14(9)24)2-6(20(29)30)3-10(12)23/h2-5,14,16-19,22-24,26-28H,1H3,(H,29,30)(H,31,32)