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