InChI=1S/C21H18O13/c22-7-3-6(17-14(27)12(25)11-9(23)1-2-10(24)18(11)33-17)4-8(5-7)32-21-16(29)13(26)15(28)19(34-21)20(30)31/h1-5,13,15-16,19,21-24,26-29H,(H,30,31)