InChI=1S/C19H21F3N2O4S/c1-4-24(14-8-6-5-7-9-14)29(27,28)15-10-11-16(13(2)12-15)23-17(25)18(3,26)19(20,21)22/h5-12,26H,4H2,1-3H3,(H,23,25)/t18-/m1/s1