InChI=1S/C21H20O13/c22-8-5-10(24)9(23)1-6(8)2-13-15(26)14-11(25)3-7(4-12(14)33-13)32-21-18(29)16(27)17(28)19(34-21)20(30)31/h1,3-5,13,16-19,21-25,27-29H,2H2,(H,30,31)