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