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