InChI=1S/C13H16F4N2O2S/c14-7-11-5-9-1-2-12(6-10(9)8-18-11)22(20,21)19-4-3-13(15,16)17/h1-2,6,11,18-19H,3-5,7-8H2/t11-/m1/s1