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