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