InChI=1S/C22H20O12/c1-32-12-5-8(33-22-19(29)17(27)18(28)20(34-22)21(30)31)4-10-14(12)16(26)13-9(15(10)25)2-7(6-23)3-11(13)24/h2-5,17-20,22-24,27-29H,6H2,1H3,(H,30,31)