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