InChI=1S/C21H20O13/c22-8-3-1-2-7(4-8)5-9(23)13(25)12-11(6-10(24)14(26)15(12)27)33-21-18(30)16(28)17(29)19(34-21)20(31)32/h1-4,6,16-19,21-22,24,26-30H,5H2,(H,31,32)