InChI=1/C21H22F4O3/c1-19(2,17-10-16(22)8-9-18(17)28-3)13-20(27,21(23,24)25)11-14-4-6-15(12-26)7-5-14/h4-10,12,27H,11,13H2,1-3H3/t20-/m0/s1 048D86E6A98FCBA9