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