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