InChI=1S/C21H18O12/c1-5-4-7-10(14(26)9-6(12(7)24)2-3-8(22)13(9)25)18(11(5)23)32-21-17(29)15(27)16(28)19(33-21)20(30)31/h2-4,15-17,19,21-23,25,27-29H,1H3,(H,30,31)