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