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