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