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