InChI=1S/C21H26F6O4/c1-2-3-4-5-6-7-8-13-30-17(28)15-9-11-16(12-10-15)18(29)31-14-20(23,24)19(22)21(25,26)27/h9-12,19H,2-8,13-14H2,1H3