InChI=1S/C22H20O12/c1-6-3-8-12(15(26)11-9(14(8)25)4-7(32-2)5-10(11)23)19(13(6)24)33-22-18(29)16(27)17(28)20(34-22)21(30)31/h3-5,16-18,20,22-24,27-29H,1-2H3,(H,30,31)