InChI=1S/C22H15F5O5/c1-12(28)11-15(13-7-3-2-4-8-13)17-18(32-20(30)21(23,24)22(25,26)27)14-9-5-6-10-16(14)31-19(17)29/h2-10,15H,11H2,1H3