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