InChI=1S/C20H27F4NO3/c1-4-5-6-7-8-9-28-19(27)17(13(2)3)25-18(26)14-10-15(20(22,23)24)12-16(21)11-14/h10-13,17H,4-9H2,1-3H3,(H,25,26)